Carbon

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Introduction

A simple, semantic and developer-friendly golang package for datetime

Carbon has been included by awesome-go, if you think it is helpful, please give me a star

github.com/golang-module/carbon

gitee.com/go-package/carbon

Installation

// By github
go get -u github.com/golang-module/carbon

import (
    "github.com/golang-module/carbon"
)

// By gitee
go get -u gitee.com/go-package/carbon

import (
    "gitee.com/go-package/carbon"
)               

Usage and example

The default timezone is Local, assuming the current time is 2020-08-05 13:14:15

Yesterday, today and tomorrow

// Return datetime of today
fmt.Sprintf("%s", carbon.Now()) // 2020-08-05 13:14:15
carbon.Now().ToDateTimeString() // 2020-08-05 13:14:15
// Return date of today
carbon.Now().ToDateString() // 2020-08-05
// Return time of today
carbon.Now().ToTimeString() // 13:14:15
// Return timestamp with second of today
carbon.Now().ToTimestamp() // 1596604455
carbon.Now().ToTimestampWithSecond() // 1596604455
// Return timestamp with millisecond of today
carbon.Now().ToTimestampWithMillisecond() // 1596604455000
// Return timestamp with microsecond of today
carbon.Now().ToTimestampWithMicrosecond() // 1596604455000000
// Return timestamp with nanosecond of today
carbon.Now().ToTimestampWithNanosecond() // 1596604455000000000
// Return datetime of today in a given timezone
carbon.Now(Carbon.NewYork).ToDateTimeString() // 2020-08-05 14:14:15
carbon.SetTimezone(Carbon.NewYork).Now().ToDateTimeString() // 2020-08-05 14:14:15

// Return datetime of yesterday 
fmt.Sprintf("%s", carbon.Yesterday()) // 2020-08-04 13:14:15
carbon.Yesterday().ToDateTimeString() // 2020-08-04 13:14:15
// Return date of yesterday
carbon.Yesterday().ToDateString() // 2020-08-04
// Return time of yesterday
carbon.Yesterday().ToTimeString() // 13:14:15
// Return timestamp with second of yesterday
carbon.Yesterday().ToTimestamp() // 1596518055
carbon.Yesterday().ToTimestampWithSecond() // 1596518055
// Return timestamp with millisecond of yesterday
carbon.Yesterday().ToTimestampWithMillisecond() // 1596518055000
// Return timestamp with microsecond of yesterday
carbon.Yesterday().ToTimestampWithMicrosecond() // 1596518055000000
// Return timestamp with nanosecond of yesterday
carbon.Yesterday().ToTimestampWithNanosecond() // 1596518055000000000
// Return datetime of yesterday on a given day
carbon.Parse("2021-01-28 13:14:15").Yesterday().ToDateTimeString() // 2021-01-27 13:14:15
// Return datetime of yesterday in a given timezone
carbon.Yesterday(Carbon.NewYork).ToDateTimeString() // 2020-08-04 14:14:15
carbon.SetTimezone(Carbon.NewYork).Yesterday().ToDateTimeString() // 2020-08-04 14:14:15

// Return datetime of tomorrow
fmt.Sprintf("%s", carbon.Tomorrow()) // 2020-08-06 13:14:15
carbon.Tomorrow().ToDateTimeString() // 2020-08-06 13:14:15
// Return date of tomorrow
carbon.Tomorrow().ToDateString() // 2020-08-06
// Return time of tomorrow
carbon.Tomorrow().ToTimeString() // 13:14:15
// Return timestamp with second of tomorrow
carbon.Tomorrow().ToTimestamp() // 1596690855
carbon.Tomorrow().ToTimestampWithSecond() // 1596690855
// Return timestamp with millisecond of tomorrow
carbon.Tomorrow().ToTimestampWithMillisecond() // 1596690855000
// Return timestamp with microsecond of tomorrow
carbon.Tomorrow().ToTimestampWithMicrosecond() // 1596690855000000
// Return timestamp with nanosecond of tomorrow
carbon.Tomorrow().ToTimestampWithNanosecond() // 1596690855000000000
// Return datetime of tomorrow on a given day
carbon.Parse("2021-01-28 13:14:15").Tomorrow().ToDateTimeString() // 2021-01-29 13:14:15
// Return datetime of tomorrow in a given timezone
carbon.Tomorrow(Carbon.NewYork).ToDateTimeString() // 2020-08-06 14:14:15
carbon.SetTimezone(Carbon.NewYork).Tomorrow().ToDateTimeString() // 2020-08-06 14:14:15

Create a Carbon instance

// Create a Carbon instance from a given timestamp with second
carbon.CreateFromTimestamp(-1).ToDateTimeString() // 1970-01-01 07:59:59
carbon.CreateFromTimestamp(-1, carbon.Tokyo).ToDateTimeString() // 1970-01-01 08:59:59
carbon.CreateFromTimestamp(0).ToDateTimeString() // 1970-01-01 08:00:00
carbon.CreateFromTimestamp(0, carbon.Tokyo).ToDateTimeString() // 1970-01-01 09:00:00
carbon.CreateFromTimestamp(1596604455).ToDateTimeString() // 2020-08-05 13:14:15
carbon.CreateFromTimestamp(1596604455, carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15
// Create a Carbon instance from a given timestamp with millisecond
carbon.CreateFromTimestamp(1596604455000).ToDateTimeString() // 2020-08-05 13:14:15
carbon.CreateFromTimestamp(1596604455000, carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15
// Create a Carbon instance from a given timestamp with microsecond
carbon.CreateFromTimestamp(1596604455000000).ToDateTimeString() // 2020-08-05 13:14:15
carbon.CreateFromTimestamp(1596604455000000, carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15
// Create a Carbon instance from a given timestamp with nanosecond
carbon.CreateFromTimestamp(1596604455000000000).ToDateTimeString() // 2020-08-05 13:14:15
carbon.CreateFromTimestamp(1596604455000000000, carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15

// Create a Carbon instance from a given year, month, day, hour, minute and second
carbon.CreateFromDateTime(2020, 8, 5, 13, 14, 15).ToDateTimeString() // 2020-08-05 13:14:15
carbon.CreateFromDateTime(2020, 8, 5, 13, 14, 15, carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15
// Create a Carbon instance from a given year, month and day
carbon.CreateFromDate(2020, 8, 5).ToDateTimeString() // 2020-08-05 13:14:15
carbon.CreateFromDate(2020, 8, 5, carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15
// Create a Carbon instance from a given hour, minute and second
carbon.CreateFromTime(13, 14, 15).ToDateTimeString() // 2020-08-05 13:14:15
carbon.CreateFromTime(13, 14, 15, carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15

Parse a standard string as a Carbon instance

carbon.Parse("").ToDateTimeString() // empty string
carbon.Parse("0").ToDateTimeString() // empty string
carbon.Parse("0000-00-00 00:00:00").ToDateTimeString() // empty string
carbon.Parse("0000-00-00").ToDateTimeString() // empty string
carbon.Parse("2020-08-05 13:14:15").ToDateTimeString() // 2020-08-05 13:14:15
carbon.Parse("2020-08-05").ToDateTimeString() // 2020-08-05 00:00:00
carbon.Parse("20200805131415").ToDateTimeString() // 2020-08-05 13:14:15
carbon.Parse("20200805").ToDateTimeString() // 2020-08-05 00:00:00
carbon.Parse("2020-08-05T13:14:15+08:00").ToDateTimeString() // 2020-08-05 13:14:15
carbon.Parse("2020-08-05 13:14:15", carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15

Parse a string as a carbon instance by format

carbon.ParseByFormat("2020|08|05 13|14|15", "Y|m|d H|i|s").ToDateTimeString() // 2020-08-05 13:14:15
carbon.ParseByFormat("It is 2020-08-05 13:14:15", "\\I\\t \\i\\s Y-m-d H:i:s").ToDateTimeString() // 2020-08-05 13:14:15
carbon.ParseByFormat("今天是 2020年08月05日13时14分15秒", "今天是 Y年m月d日H时i分s秒").ToDateTimeString() // 2020-08-05 13:14:15
carbon.ParseByFormat("2020-08-05 13:14:15", "Y-m-d H:i:s", carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15

Parse a string as a carbon instance by layout

carbon.ParseByLayout("2020|08|05 13|14|15", "2006|01|02 15|04|05").ToDateTimeString() // 2020-08-05 13:14:15
carbon.ParseByLayout("It is 2020-08-05 13:14:15", "It is 2006-01-02 15:04:05").ToDateTimeString() // 2020-08-05 13:14:15
carbon.ParseByLayout("今天是 2020年08月05日13时14分15秒", "今天是 2006年01月02日15时04分05秒").ToDateTimeString() // 2020-08-05 13:14:15
carbon.ParseByLayout("2020-08-05 13:14:15", "2006-01-02 15:04:05", carbon.Tokyo).ToDateTimeString() // 2020-08-05 14:14:15

Convert between carbon and time.Time

// Convert Time.time into Carbon
carbon.Time2Carbon(time.Now())
// Convert Carbon into Time.time
carbon.Now().Carbon2Time()

Start and end

// Start of the century
carbon.Parse("2020-08-05 13:14:15").StartOfCentury().ToDateTimeString() // 2000-01-01 00:00:00
// End of the century
carbon.Parse("2020-08-05 13:14:15").EndOfCentury().ToDateTimeString() // 2999-12-31 23:59:59

// Start of the decade
carbon.Parse("2020-08-05 13:14:15").StartOfDecade().ToDateTimeString() // 2020-01-01 00:00:00
carbon.Parse("2021-08-05 13:14:15").StartOfDecade().ToDateTimeString() // 2020-01-01 00:00:00
carbon.Parse("2029-08-05 13:14:15").StartOfDecade().ToDateTimeString() // 2020-01-01 00:00:00
// End of the decade
carbon.Parse("2020-08-05 13:14:15").EndOfDecade().ToDateTimeString() // 2029-12-31 23:59:59
carbon.Parse("2021-08-05 13:14:15").EndOfDecade().ToDateTimeString() // 2029-12-31 23:59:59
carbon.Parse("2029-08-05 13:14:15").EndOfDecade().ToDateTimeString() // 2029-12-31 23:59:59

// Start of the year
carbon.Parse("2020-08-05 13:14:15").StartOfYear().ToDateTimeString() // 2020-01-01 00:00:00
// End of the year
carbon.Parse("2020-08-05 13:14:15").EndOfYear().ToDateTimeString() // 2020-12-31 23:59:59

// Start of the quarter
carbon.Parse("2020-08-05 13:14:15").StartOfQuarter().ToDateTimeString() // 2020-07-01 00:00:00
// End of the quarter
carbon.Parse("2020-08-05 13:14:15").EndOfQuarter().ToDateTimeString() // 2020-09-30 23:59:59

// Start of the month
carbon.Parse("2020-08-05 13:14:15").StartOfMonth().ToStartTimeString() // 2020-08-01 00:00:00
// End of the month
carbon.Parse("2020-08-05 13:14:15").EndOfMonth().ToDateTimeString() // 2020-08-31 23:59:59

// Start of the week
carbon.Parse("2020-08-05 13:14:15").StartOfWeek(time.Sunday).ToDateTimeString() // 2020-08-02 00:00:00
carbon.Parse("2020-08-05 13:14:15").StartOfWeek(time.Monday).ToDateTimeString() // 2020-08-03 00:00:00
// End of the week
carbon.Parse("2020-08-05 13:14:15").EndOfWeek(time.Sunday).ToDateTimeString() // 2020-08-08 23:59:59
carbon.Parse("2020-08-05 13:14:15").EndOfWeek(time.Monday).ToDateTimeString() // 2020-08-09 23:59:59

// Start of the day
carbon.Parse("2020-08-05 13:14:15").StartOfDay().ToDateTimeString() // 2020-08-05 00:00:00
// End of the day
carbon.Parse("2020-08-05 13:14:15").EndOfDay().ToDateTimeString() // 2020-08-05 23:59:59

// Start of the hour
carbon.Parse("2020-08-05 13:14:15").StartOfHour().ToDateTimeString() // 2020-08-05 13:00:00
// End of the hour
carbon.Parse("2020-08-05 13:14:15").EndOfHour().ToDateTimeString() // 2020-08-05 13:59:59

// Start of the minute
carbon.Parse("2020-08-05 13:14:15").StartOfMinute().ToDateTimeString() // 2020-08-05 13:14:00
// End of the minute
carbon.Parse("2020-08-05 13:14:15").EndOfMinute().ToDateTimeString() // 2020-08-05 13:14:59

// Start of the second
carbon.Parse("2020-08-05 13:14:15").StartOfSecond().Format("Y-m-d H:i:s.u") // 2020-08-05 13:14:15.0
// End of the second
carbon.Parse("2020-08-05 13:14:15").EndOfSecond().Format("Y-m-d H:i:s.u") // 2020-08-05 13:14:15.999

Addition and subtraction

// Add three centuries
carbon.Parse("2020-02-29 13:14:15").AddCenturies(3).ToDateTimeString() // 2320-02-29 13:14:15
// Add three centuries without overflowing month
carbon.Parse("2020-02-29 13:14:15").AddCenturiesNoOverflow(3).ToDateTimeString() // 2320-02-29 13:14:15
// Add one century
carbon.Parse("2020-02-29 13:14:15").AddCentury().ToDateTimeString() // 2120-02-29 13:14:15
// Add one century without overflowing month
carbon.Parse("2020-02-29 13:14:15").AddCenturyNoOverflow().ToDateTimeString() // 2120-02-29 13:14:15
// Subtract three centuries
carbon.Parse("2020-02-29 13:14:15").SubCenturies(3).ToDateTimeString() // 1720-02-29 13:14:15
// Subtract three centuries without overflowing month
carbon.Parse("2020-02-29 13:14:15").SubCenturiesNoOverflow(3).ToDateTimeString() // 1720-02-29 13:14:15
// Subtract one century
carbon.Parse("2020-02-29 13:14:15").SubCentury().ToDateTimeString() // 1920-02-29 13:14:15
// Subtract one century without overflowing month
carbon.Parse("2020-02-29 13:14:15").SubCenturyNoOverflow().ToDateTimeString() // 1920-02-20 13:14:15

// Add three decades
carbon.Parse("2020-02-29 13:14:15").Decades(3).ToDateTimeString() // 2050-03-01 13:14:15
// Add three decades without overflowing month
carbon.Parse("2020-02-29 13:14:15").AddDecadesNoOverflow(3).ToDateTimeString() // 2050-02-28 13:14:15
// Add one decade
carbon.Parse("2020-02-29 13:14:15").AddDecade().ToDateTimeString() // 2030-03-01 13:14:15
// Add one decade without overflowing month
carbon.Parse("2020-02-29 13:14:15").AddDecadeNoOverflow().ToDateTimeString() // 2030-02-28 13:14:15
// Subtract three decades
carbon.Parse("2020-02-29 13:14:15").SubDecades(3).ToDateTimeString() // 1990-03-01 13:14:15
// Subtract three decades without overflowing month
carbon.Parse("2020-02-29 13:14:15").SubDecadesNoOverflow(3).ToDateTimeString() // 1990-02-28 13:14:15
// Subtract one decade
carbon.Parse("2020-02-29 13:14:15").SubDecade().ToDateTimeString() // 2010-03-01 13:14:15
// Subtract one decade without overflowing month
carbon.Parse("2020-02-29 13:14:15").SubDecadeNoOverflow().ToDateTimeString() // 2010-02-28 13:14:15

// Add three years
carbon.Parse("2020-02-29 13:14:15").AddYears(3).ToDateTimeString() // 2023-03-01 13:14:15
// Add three years without overflowing month
carbon.Parse("2020-02-29 13:14:15").AddYearsNoOverflow(3).ToDateTimeString() // 2023-02-28 13:14:15
// Add one year
carbon.Parse("2020-02-29 13:14:15").AddYear().ToDateTimeString() // 2021-03-01 13:14:15
// Add one year without overflowing month
carbon.Parse("2020-02-29 13:14:15").AddYearNoOverflow().ToDateTimeString() // 2021-02-28 13:14:15
// Subtract three years
carbon.Parse("2020-02-29 13:14:15").SubYears(3).ToDateTimeString() // 2017-03-01 13:14:15
// Subtract three years without overflowing month
carbon.Parse("2020-02-29 13:14:15").SubYearsNoOverflow(3).ToDateTimeString() // 2017-02-28 13:14:15
// Subtract one year
carbon.Parse("2020-02-29 13:14:15").SubYear().ToDateTimeString() // 2019-03-01 13:14:15
// Subtract one year without overflowing month
carbon.Parse("2020-02-29 13:14:15").SubYearNoOverflow().ToDateTimeString() // 2019-02-28 13:14:15

// Add three quarters
carbon.Parse("2019-08-31 13:14:15").AddQuarters(3).ToDateTimeString() // 2019-03-02 13:14:15
// Add three quarters without overflowing month
carbon.Parse("2019-08-31 13:14:15").AddQuartersNoOverflow(3).ToDateTimeString() // 2019-02-29 13:14:15
// Add one quarter
carbon.Parse("2019-11-30 13:14:15").AddQuarter().ToDateTimeString() // 2020-03-01 13:14:15
// Add one quarter without overflowing month
carbon.Parse("2019-11-30 13:14:15").AddQuarterNoOverflow().ToDateTimeString() // 2020-02-29 13:14:15
// Subtract three quarters
carbon.Parse("2019-08-31 13:14:15").SubQuarters(3).ToDateTimeString() // 2019-03-03 13:14:15
// Subtract three quarters without overflowing month
carbon.Parse("2019-08-31 13:14:15").SubQuartersNoOverflow(3).ToDateTimeString() // 2019-02-28 13:14:15
// Subtract one quarter
carbon.Parse("2020-05-31 13:14:15").SubQuarter().ToDateTimeString() // 2020-03-02 13:14:15
// Subtract one quarter without overflowing month
carbon.Parse("2020-05-31 13:14:15").SubQuarterNoOverflow().ToDateTimeString() // 2020-02-29 13:14:15

// Add three months
carbon.Parse("2020-02-29 13:14:15").AddMonths(3).ToDateTimeString() // 2020-05-29 13:14:15
// Add three months without overflowing month
carbon.Parse("2020-02-29 13:14:15").AddMonthsNoOverflow(3).ToDateTimeString() // 2020-05-29 13:14:15
// Add one month
carbon.Parse("2020-01-31 13:14:15").AddMonth().ToDateTimeString() // 2020-03-02 13:14:15
// Add one month without overflowing month
carbon.Parse("2020-01-31 13:14:15").AddMonthNoOverflow().ToDateTimeString() // 2020-02-29 13:14:15
// Subtract three months
carbon.Parse("2020-02-29 13:14:15").SubMonths(3).ToDateTimeString() // 2019-11-29 13:14:15
// Subtract three months without overflowing month
carbon.Parse("2020-02-29 13:14:15").SubMonthsNoOverflow(3).ToDateTimeString() // 2019-11-29 13:14:15
// Subtract one month
carbon.Parse("2020-03-31 13:14:15").SubMonth().ToDateTimeString() // 2020-03-02 13:14:15
// Subtract one month without overflowing month
carbon.Parse("2020-03-31 13:14:15").SubMonthNoOverflow().ToDateTimeString() // 2020-02-29 13:14:15

// Add three weeks
carbon.Parse("2020-02-29 13:14:15").AddWeeks(3).ToDateTimeString() // 2020-03-21 13:14:15
// Add one week
carbon.Parse("2020-02-29 13:14:15").AddWeek().ToDateTimeString() // 2020-03-07 13:14:15
// Subtract three weeks
carbon.Parse("2020-02-29 13:14:15").SubWeeks(3).ToDateTimeString() // 2020-02-08 13:14:15
// Subtract three week
carbon.Parse("2020-02-29 13:14:15").SubWeek().ToDateTimeString() // 2020-02-22 13:14:15

// Add three days
carbon.Parse("2020-08-05 13:14:15").AddDays(3).ToDateTimeString() // 2020-08-08 13:14:15
// Add one day
carbon.Parse("2020-08-05 13:14:15").AddDay().ToDateTimeString() // 2020-08-05 13:14:15
// Subtract three days
carbon.Parse("2020-08-05 13:14:15").SubDays(3).ToDateTimeString() // 2020-08-02 13:14:15
// Subtract one day
carbon.Parse("2020-08-05 13:14:15").SubDay().ToDateTimeString() // 2020-08-04 13:14:15

// Add three hours
carbon.Parse("2020-08-05 13:14:15").AddHours(3).ToDateTimeString() // 2020-08-05 16:14:15
// Add two and a half hours
carbon.Parse("2020-08-05 13:14:15").AddDuration("2.5h").ToDateTimeString() // 2020-08-05 15:44:15
carbon.Parse("2020-08-05 13:14:15").AddDuration("2h30m").ToDateTimeString() // 2020-08-05 15:44:15
// Add one hour
carbon.Parse("2020-08-05 13:14:15").AddHour().ToDateTimeString() // 2020-08-05 14:14:15
// Subtract three hours
carbon.Parse("2020-08-05 13:14:15").SubHours(3).ToDateTimeString() // 2020-08-05 10:14:15
// Subtract two and a half hours
carbon.Parse("2020-08-05 13:14:15").SubDuration("2.5h").ToDateTimeString() // 2020-08-05 10:44:15
carbon.Parse("2020-08-05 13:14:15").SubDuration("2h30m").ToDateTimeString() // 2020-08-05 10:44:15
// Subtract one hour
carbon.Parse("2020-08-05 13:14:15").SubHour().ToDateTimeString() // 2020-08-05 12:14:15

// Add three minutes
carbon.Parse("2020-08-05 13:14:15").AddMinutes(3).ToDateTimeString() // 2020-08-05 13:17:15
// Add two and a half minutes
carbon.Parse("2020-08-05 13:14:15").AddDuration("2.5m").ToDateTimeString() // 2020-08-05 13:16:45
carbon.Parse("2020-08-05 13:14:15").AddDuration("2m30s").ToDateTimeString() // 2020-08-05 13:16:45
// Add one minute
carbon.Parse("2020-08-05 13:14:15").AddMinute().ToDateTimeString() // 2020-08-05 13:15:15
// Subtract three minutes
carbon.Parse("2020-08-05 13:14:15").SubMinutes(3).ToDateTimeString() // 2020-08-05 13:11:15
// Subtract two and a half minutes
carbon.Parse("2020-08-05 13:14:15").SubDuration("2.5m").ToDateTimeString() // 2020-08-05 13:11:45
// Subtract one minute
carbon.Parse("2020-08-05 13:14:15").SubMinute().ToDateTimeString() // 2020-08-05 13:13:15

// Add three seconds
carbon.Parse("2020-08-05 13:14:15").AddSeconds(3).ToDateTimeString() // 2020-08-05 13:14:18
// Add two and a half seconds
carbon.Parse("2020-08-05 13:14:15").AddDuration("2.5s").ToDateTimeString() // 2020-08-05 13:14:17
// Add one second
carbon.Parse("2020-08-05 13:14:15").AddSecond().ToDateTimeString() // 2020-08-05 13:14:16
// Subtract three seconds
carbon.Parse("2020-08-05 13:14:15").SubSeconds(3).ToDateTimeString() // 2020-08-05 13:14:12
// Subtract two and a half seconds
carbon.Parse("2020-08-05 13:14:15").SubDuration("2.5s").ToDateTimeString() // 2020-08-05 13:14:12
// Subtract one second
carbon.Parse("2020-08-05 13:14:15").SubSecond().ToDateTimeString() // 2020-08-05 13:14:14

Difference

// Difference in years
carbon.Parse("2021-08-05 13:14:15").DiffInYears(carbon.Parse("2020-08-05 13:14:15")) // -1
// Difference in years with absolute value
carbon.Parse("2021-08-05 13:14:15").DiffInYearsWithAbs(carbon.Parse("2020-08-05 13:14:15")) // 1

// Difference in months
carbon.Parse("2020-08-05 13:14:15").DiffInMonths(carbon.Parse("2020-07-05 13:14:15")) // -1
// Difference in months with absolute value
carbon.Parse("2020-08-05 13:14:15").DiffInMonthsWithAbs(carbon.Parse("2020-07-05 13:14:15")) // 1

// Difference in weeks
carbon.Parse("2020-08-05 13:14:15").DiffInWeeks(carbon.Parse("2020-07-28 13:14:15")) // -1
// Difference in weeks with absolute value
carbon.Parse("2020-08-05 13:14:15").DiffInWeeksWithAbs(carbon.Parse("2020-07-28 13:14:15")) // 1

// Difference in days
carbon.Parse("2020-08-05 13:14:15").DiffInDays(carbon.Parse("2020-08-04 13:14:15")) // -1
// Difference in days with absolute value
carbon.Parse("2020-08-05 13:14:15").DiffInDaysWithAbs(carbon.Parse("2020-08-04 13:14:15")) // 1

// Difference in hours
carbon.Parse("2020-08-05 13:14:15").DiffInHours(carbon.Parse("2020-08-05 12:14:15")) // -1
// Difference in hours with absolute value
carbon.Parse("2020-08-05 13:14:15").DiffInHoursWithAbs(carbon.Parse("2020-08-05 12:14:15")) // 1

// Difference in minutes
carbon.Parse("2020-08-05 13:14:15").DiffInMinutes(carbon.Parse("2020-08-05 13:13:15")) // -1
// Difference in minutes with absolute value
carbon.Parse("2020-08-05 13:14:15").DiffInMinutesWithAbs(carbon.Parse("2020-08-05 13:13:15")) // 1

// Difference in seconds
carbon.Parse("2020-08-05 13:14:15").DiffInSeconds(carbon.Parse("2020-08-05 13:14:14")) // -1
// Difference in seconds with absolute value
carbon.Parse("2020-08-05 13:14:15").DiffInSecondsWithAbs(carbon.Parse("2020-08-05 13:14:14")) // 1

// Difference in human friendly readable format
carbon.Parse("2020-08-05 13:14:15").DiffForHumans()) // just now
carbon.Parse("2019-08-05 13:14:15").DiffForHumans() // 1 year ago
carbon.Parse("2018-08-05 13:14:15").DiffForHumans() // 2 years ago
carbon.Parse("2021-08-05 13:14:15").DiffForHumans() // 1 year from now
carbon.Parse("2022-08-05 13:14:15").DiffForHumans() // 2 years from now
// Difference in human friendly readable format from now time
carbon.Parse("2020-08-05 13:14:15").DiffForHumans(carbon.Now()) // 1 year before
carbon.Parse("2019-08-05 13:14:15").DiffForHumans(carbon.Now()) // 2 years before
carbon.Parse("2018-08-05 13:14:15").DiffForHumans(carbon.Now()) // 1 year after
carbon.Parse("2022-08-05 13:14:15").DiffForHumans(carbon.Now()) // 2 years after

Comparison

// Whether is zero time
carbon.Parse("").IsZero() // true
carbon.Parse("0").IsZero() // true
carbon.Parse("0000-00-00 00:00:00").IsZero() // true
carbon.Parse("0000-00-00").IsZero() // true
carbon.Parse("00:00:00").IsZero() // true
carbon.Parse("2020-08-05 00:00:00").IsZero() // false
carbon.Parse("2020-08-05").IsZero() // false
carbon.Parse("2020-08-05").SetTimezone("xxx").IsZero() // false

// Whether is invalid time
carbon.Parse("").IsInvalid() // true
carbon.Parse("0").IsInvalid() // true
carbon.Parse("0000-00-00 00:00:00").IsInvalid() // true
carbon.Parse("0000-00-00").IsInvalid() // true
carbon.Parse("00:00:00").IsInvalid() // true
carbon.Parse("2020-08-05 00:00:00").IsInvalid() // false
carbon.Parse("2020-08-05").IsInvalid() // false
carbon.Parse("2020-08-05").SetTimezone("xxx").IsInvalid() // true

// Whether is now time
carbon.Now().IsNow() // true
// Whether is future time
carbon.Tomorrow().IsFuture() // true
// Whether is pass time
carbon.Yesterday().IsPast() // true

// Whether is a leap year
carbon.Parse("2020-08-05 13:14:15").IsLeapYear() // true
// Whether is a long year
carbon.Parse("2020-08-05 13:14:15").IsLongYear() // true

// Whether is January 
carbon.Parse("2020-08-05 13:14:15").IsJanuary() // false
// Whether is February
carbon.Parse("2020-08-05 13:14:15").IsFebruary() // false
// Whether is March
carbon.Parse("2020-08-05 13:14:15").IsMarch() // false
// Whether is April
carbon.Parse("2020-08-05 13:14:15").IsApril()  // false
// Whether is May
carbon.Parse("2020-08-05 13:14:15").IsMay() // false
// Whether is June
carbon.Parse("2020-08-05 13:14:15").IsJune() // false
// Whether is July
carbon.Parse("2020-08-05 13:14:15").IsJuly() // false
// Whether is August
carbon.Parse("2020-08-05 13:14:15").IsAugust() // false
// Whether is September
carbon.Parse("2020-08-05 13:14:15").IsSeptember() // true
// Whether is October
carbon.Parse("2020-08-05 13:14:15").IsOctober() // false
// Whether is November
carbon.Parse("2020-08-05 13:14:15").IsNovember() // false
// Whether is December
carbon.Parse("2020-08-05 13:14:15").IsDecember() // false

// Whether is Monday
carbon.Parse("2020-08-05 13:14:15").IsMonday() // false
// Whether is Tuesday
carbon.Parse("2020-08-05 13:14:15").IsTuesday() // true
// Whether is Wednesday
carbon.Parse("2020-08-05 13:14:15").IsWednesday() // false
// Whether is Thursday
carbon.Parse("2020-08-05 13:14:15").IsThursday()  // false
// Whether is Friday
carbon.Parse("2020-08-05 13:14:15").IsFriday() // false
// Whether is Saturday
carbon.Parse("2020-08-05 13:14:15").IsSaturday() // false
// Whether is Sunday
carbon.Parse("2020-08-05 13:14:15").IsSunday() // false
// Whether is weekday
carbon.Parse("2020-08-05 13:14:15").IsWeekday() // false
// Whether is weekend
carbon.Parse("2020-08-05 13:14:15").IsWeekend() // true

// Whether is yesterday
carbon.Parse("2020-08-04 13:14:15").IsYesterday() // true
carbon.Parse("2020-08-04 00:00:00").IsYesterday() // true
carbon.Parse("2020-08-04").IsYesterday() // true
// Whether is today
carbon.Parse("2020-08-05 13:14:15").IsToday() // true
carbon.Parse("2020-08-05 00:00:00").IsToday() // true
carbon.Parse("2020-08-05").IsToday() // true
// Whether is tomorrow
carbon.Parse("2020-08-06 13:14:15").IsTomorrow() // true
carbon.Parse("2020-08-06 00:00:00").IsTomorrow() // true
carbon.Parse("2020-08-06").IsTomorrow() // true

// Whether greater than
carbon.Parse("2020-08-05 13:14:15").Gt(carbon.Parse("2020-08-04 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Gt(carbon.Parse("2020-08-05 13:14:15")) // false
carbon.Parse("2020-08-05 13:14:15").Compare(">", carbon.Parse("2020-08-04 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Compare(">", carbon.Parse("2020-08-05 13:14:15")) // false

// Whether less than
carbon.Parse("2020-08-05 13:14:15").Lt(carbon.Parse("2020-08-06 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Lt(carbon.Parse("2020-08-05 13:14:15")) // false
carbon.Parse("2020-08-05 13:14:15").Compare("<", carbon.Parse("2020-08-06 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Compare("<", carbon.Parse("2020-08-05 13:14:15")) // false

// Whether equal
carbon.Parse("2020-08-05 13:14:15").Eq(carbon.Parse("2020-08-05 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Eq(carbon.Parse("2020-08-05 13:14:00")) // false
carbon.Parse("2020-08-05 13:14:15").Compare("=", carbon.Parse("2020-08-05 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Compare("=", carbon.Parse("2020-08-05 13:14:00")) // false

// Whether not equal
carbon.Parse("2020-08-05 13:14:15").Ne(carbon.Parse("2020-08-06 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Ne(carbon.Parse("2020-08-05 13:14:15")) // false
carbon.Parse("2020-08-05 13:14:15").Compare("!=", carbon.Parse("2020-08-06 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Compare("<>", carbon.Parse("2020-08-05 13:14:15")) // false

// Whether greater than or equal
carbon.Parse("2020-08-05 13:14:15").Gte(carbon.Parse("2020-08-04 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Gte(carbon.Parse("2020-08-05 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Compare(">=", carbon.Parse("2020-08-04 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Compare(">=", carbon.Parse("2020-08-05 13:14:15")) // true

// Whether less than or equal
carbon.Parse("2020-08-05 13:14:15").Lte(carbon.Parse("2020-08-06 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Lte(carbon.Parse("2020-08-05 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Compare("<=", carbon.Parse("2020-08-06 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").Compare("<=", carbon.Parse("2020-08-05 13:14:15")) // true

// Whether between two Carbon instances, excluded the start and end Carbon instance
carbon.Parse("2020-08-05 13:14:15").Between(carbon.Parse("2020-08-05 13:14:15"), carbon.Parse("2020-08-06 13:14:15")) // false
carbon.Parse("2020-08-05 13:14:15").Between(carbon.Parse("2020-08-04 13:14:15"), carbon.Parse("2020-08-06 13:14:15")) // true

// Whether between two Carbon instances, included the start Carbon instance
carbon.Parse("2020-08-05 13:14:15").BetweenIncludedStart(carbon.Parse("2020-08-05 13:14:15"), carbon.Parse("2020-08-06 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").BetweenIncludedStart(carbon.Parse("2020-08-04 13:14:15"), carbon.Parse("2020-08-06 13:14:15")) // true

// Whether between two Carbon instances, included the end Carbon instance
carbon.Parse("2020-08-05 13:14:15").BetweenIncludedEnd(carbon.Parse("2020-08-04 13:14:15"), carbon.Parse("2020-08-05 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").BetweenIncludedEnd(carbon.Parse("2020-08-04 13:14:15"), carbon.Parse("2020-08-06 13:14:15")) // true

// Whether between two Carbon instances, included the start and end Carbon instance
carbon.Parse("2020-08-05 13:14:15").BetweenIncludedBoth(carbon.Parse("2020-08-05 13:14:15"), carbon.Parse("2020-08-06 13:14:15")) // true
carbon.Parse("2020-08-05 13:14:15").BetweenIncludedBoth(carbon.Parse("2020-08-04 13:14:15"), carbon.Parse("2020-08-05 13:14:15")) // true

For the definition of long year, please see https://en.wikipedia.org/wiki/ISO_8601#Week_dates

Setter

// Set timezone
carbon.SetTimezone(carbon.PRC).Now().ToDateTimeString() // 2020-08-05 13:14:15
carbon.SetTimezone(carbon.Tokyo).Now().ToDateTimeString() // 2020-08-05 14:14:15
carbon.SetTimezone(carbon.Tokyo).Now().SetTimezone(carbon.PRC).ToDateTimeString() // 2020-08-05 12:14:15

// Set locale
carbon.Parse("2020-07-05 13:14:15").SetLocale("en").DiffForHumans() // 1 month before
carbon.Parse("2020-07-05 13:14:15").SetLocale("zh-CN").DiffForHumans() // 1 月前

// Set year
carbon.Parse("2020-02-29").SetYear(2021).ToDateString() // 2021-03-01
// Set year without overflowing month
carbon.Parse("2020-02-29").SetYearNoOverflow(2021).ToDateString() // 2021-02-28

// Set month
carbon.Parse("2020-01-31").SetMonth(2).ToDateString() // 2020-03-02
// Set month without overflowing month
carbon.Parse("2020-01-31").SetMonthNoOverflow(2).ToDateString() // 2020-02-29

// Set day
carbon.Parse("2019-08-05").SetDay(31).ToDateString() // 2020-08-31
carbon.Parse("2020-02-01").SetDay(31).ToDateString() // 2020-03-02

// Set hour
carbon.Parse("2020-08-05 13:14:15").SetHour(10).ToDateTimeString() // 2020-08-05 10:14:15
carbon.Parse("2020-08-05 13:14:15").SetHour(24).ToDateTimeString() // 2020-08-06 00:14:15

// Set minute
carbon.Parse("2020-08-05 13:14:15").SetMinute(10).ToDateTimeString() // 2020-08-05 13:10:15
carbon.Parse("2020-08-05 13:14:15").SetMinute(60).ToDateTimeString() // 2020-08-05 14:00:15

// Set second
carbon.Parse("2020-08-05 13:14:15").SetSecond(10).ToDateTimeString() // 2020-08-05 13:14:10
carbon.Parse("2020-08-05 13:14:15").SetSecond(60).ToDateTimeString() // 2020-08-05 13:15:00

// set millisecond
carbon.Parse("2020-08-05 13:14:15").SetMillisecond(100).Millisecond() // 100
carbon.Parse("2020-08-05 13:14:15").SetMillisecond(999).Millisecond() // 999

// set microsecond
carbon.Parse("2020-08-05 13:14:15").SetMicrosecond(100000).Microsecond() // 100000
carbon.Parse("2020-08-05 13:14:15").SetMicrosecond(999999).Microsecond() // 999999

// set nanosecond
carbon.Parse("2020-08-05 13:14:15").SetNanosecond(100000000).Nanosecond() // 100000000
carbon.Parse("2020-08-05 13:14:15").SetNanosecond(999999999).Nanosecond() // 999999999

Getter

// Get total days of the year
carbon.Parse("2019-08-05 13:14:15").DaysInYear() // 365
carbon.Parse("2020-08-05 13:14:15").DaysInYear() // 366
// Get total days of the month
carbon.Parse("2020-02-01 13:14:15").DaysInMonth() // 29
carbon.Parse("2020-04-01 13:14:15").DaysInMonth() // 30
carbon.Parse("2020-08-01 13:14:15").DaysInMonth() // 31

// Get day of the year
carbon.Parse("2020-08-05 13:14:15").DayOfYear() // 218
// Get week of the year
carbon.Parse("2020-08-05 13:14:15").WeekOfYear() // 32
// Get day of the month
carbon.Parse("2020-08-05 13:14:15").DayOfMonth() // 5
// Get week of the month
carbon.Parse("2020-08-05 13:14:15").WeekOfMonth() // 1
// Get day of the week
carbon.Parse("2020-08-05 13:14:15").DayOfWeek() // 3

// Get current century
carbon.Parse("2020-08-05 13:14:15").Century() // 21
// Get current decade
carbon.Parse("2019-08-05 13:14:15").Decade() // 10
carbon.Parse("2021-08-05 13:14:15").Decade() // 20
// Get current year
carbon.Parse("2020-08-05 13:14:15").Year() // 2020
// Get current quarter
carbon.Parse("2020-08-05 13:14:15").Quarter() // 3
// Get current month
carbon.Parse("2020-08-05 13:14:15").Month() // 8
// Get current week(start with 0)
carbon.Parse("2020-08-05 13:14:15").Week() // 3
carbon.Parse("2020-08-05 13:14:15").Week() // 3
// Get current day
carbon.Parse("2020-08-05 13:14:15").Day() // 5
// Get current hour
carbon.Parse("2020-08-05 13:14:15").Hour() // 13
// Get current minute
carbon.Parse("2020-08-05 13:14:15").Minute() // 14
// Get current second
carbon.Parse("2020-08-05 13:14:15").Second() // 15
// Get current millisecond
carbon.Parse("2020-08-05 13:14:15").Millisecond() // 1596604455000
// Get current microsecond
carbon.Parse("2020-08-05 13:14:15").Microsecond() // 1596604455000000
// Get current nanosecond
carbon.Parse("2020-08-05 13:14:15").Nanosecond() // 1596604455000000000

// Get timezone name
carbon.SetTimezone(carbon.PRC).Timezone() // CST
carbon.SetTimezone(carbon.Tokyo).Timezone() // JST

// Get location name
carbon.SetTimezone(carbon.PRC).Location() // PRC
carbon.SetTimezone(carbon.Tokyo).Location() // Asia/Tokyo

// Get offset seconds from the UTC timezone
carbon.SetTimezone(carbon.PRC).Offset() // 28800
carbon.SetTimezone(carbon.Tokyo).Offset() // 32400

// Get locale name
carbon.Now().SetLocale("en").Locale() // en
carbon.Now().SetLocale("zh-CN").Locale() // zh-CN

// Get constellation name
carbon.Now().Constellation() // Leo
carbon.Now().SetLocale("en").Constellation() // Leo
carbon.Now().SetLocale("zh-CN").Constellation() // 狮子座

//Get season name
carbon.Now().Season() // Summer
carbon.Now().SetLocale("en").Season() // Summer
carbon.Now().SetLocale("zh-CN").Season() // 夏季

// Get current age
carbon.Parse("2002-01-01 13:14:15").Age() // 17
carbon.Parse("2002-12-31 13:14:15").Age() // 18

Output

// Output a timestamp with second, ToTimestamp() is short for ToTimestampWithSecond()
carbon.Parse("2020-08-05 13:14:15").ToTimestamp() // 1596604455
carbon.Parse("2020-08-05 13:14:15").ToTimestampWithSecond() // 1596604455
// Output a timestamp with millisecond
carbon.Parse("2020-08-05 13:14:15").ToTimestampWithMillisecond() // 1596604455000
// Output a timestamp with microsecond
carbon.Parse("2020-08-05 13:14:15").ToTimestampWithMicrosecond() // 1596604455000000
// Output a timestamp with nanosecond
carbon.Parse("2020-08-05 13:14:15").ToTimestampWithNanosecond() // 1596604455000000000

// Output a string in date and time format
carbon.Parse("2020-08-05 13:14:15").ToDateTimeString() // 2020-08-05 13:14:15
carbon.Parse("2020-08-05 13:14:15").ToDateTimeString(carbon.Tokyo) // 2020-08-05 14:14:15
// Output a string in short date and time format
carbon.Parse("2020-08-05 13:14:15").ToShortDateTimeString() // 20200805131415
carbon.Parse("2020-08-05 13:14:15").ToShortDateTimeString(carbon.Tokyo) // 20200805141415

// Output a in date format string
carbon.Parse("2020-08-05 13:14:15").ToDateString() // 2020-08-05
carbon.Parse("2020-08-05 13:14:15").ToDateString(carbon.Tokyo) // 2020-08-05
// Output a string in short date format
carbon.Parse("2020-08-05 13:14:15").ToShortDateString() // 20200805
carbon.Parse("2020-08-05 13:14:15").ToShortDateString(carbon.Tokyo) // 20200805

// Output a string in time format
carbon.Parse("2020-08-05 13:14:15").ToTimeString() // 13:14:15
carbon.Parse("2020-08-05 13:14:15").ToTimeString(carbon.Tokyo) // 14:14:15
// Output a string in short time format
carbon.Parse("2020-08-05 13:14:15").ToShortTimeString() // 131415
carbon.Parse("2020-08-05 13:14:15").ToShortTimeString(carbon.Tokyo) // 141415

// Output a string in Ansic format
carbon.Parse("2020-08-05 13:14:15").ToAnsicString() // Wed Aug  5 13:14:15 2020
carbon.Parse("2020-08-05 13:14:15").ToAnsicString(carbon.Tokyo) // Wed Aug  5 14:14:15 2020
// Output a string in Atom format
carbon.Parse("2020-08-05 13:14:15").ToAtomString() // 2020-08-05T13:14:15+08:00
carbon.Parse("2020-08-05 13:14:15").ToAtomString(carbon.Tokyo) // 2020-08-05T14:14:15+08:00
// Output a string in unix date format
carbon.Parse("2020-08-05 13:14:15").ToUnixDateString() // Wed Aug  5 13:14:15 CST 2020
carbon.Parse("2020-08-05 13:14:15").ToUnixDateString(carbon.Tokyo) // Wed Aug  5 14:14:15 JST 2020
// Output a string in ruby date format
carbon.Parse("2020-08-05 13:14:15").ToRubyDateString() // Wed Aug 05 13:14:15 +0800 2020
carbon.Parse("2020-08-05 13:14:15").ToRubyDateString(carbon.Tokyo) // Wed Aug 05 14:14:15 +0900 2020
// Output a string in Kitchen format
carbon.Parse("2020-08-05 13:14:15").ToKitchenString() // 1:14PM
carbon.Parse("2020-08-05 13:14:15").ToKitchenString(carbon.Tokyo) // 2:14PM
// Output a string in Cookie format
carbon.Parse("2020-08-05 13:14:15").ToCookieString() // Wednesday, 05-Aug-2020 13:14:15 CST
carbon.Parse("2020-08-05 13:14:15").ToCookieString(carbon.Tokyo) // Wednesday, 05-Aug-2020 14:14:15 JST
// Output a string in day, date and time format
carbon.Parse("2020-08-05 13:14:15").ToDayDateTimeString() // Wed, Aug 5, 2020 1:14 PM
carbon.Parse("2020-08-05 13:14:15").ToDayDateTimeString(carbon.Tokyo) // Wed, Aug 5, 2020 2:14 PM
// Output a string in RSS format
carbon.Parse("2020-08-05 13:14:15").ToRssString() // Wed, 05 Aug 2020 13:14:15 +0800
carbon.Parse("2020-08-05 13:14:15").ToRssString(carbon.Tokyo) // Wed, 05 Aug 2020 14:14:15 +0900
// Output a string in W3C format
carbon.Parse("2020-08-05 13:14:15").ToW3cString() // 2020-08-05T13:14:15+08:00
carbon.Parse("2020-08-05 13:14:15").ToW3cString(carbon.Tokyo) // 2020-08-05T14:14:15+09:00

// Output a string in ISO8601 format
carbon.Parse("2020-08-05 13:14:15").ToIso8601String() // 2020-08-05T13:14:15+08:00
carbon.Parse("2020-08-05 13:14:15").ToIso8601String(carbon.Tokyo) // 2020-08-05T14:14:15+09:00
// Output a string in RFC822 format
carbon.Parse("2020-08-05 13:14:15").ToRfc822String() // 05 Aug 20 13:14 CST
carbon.Parse("2020-08-05 13:14:15").ToRfc822String(carbon.Tokyo) // 05 Aug 20 14:14 JST
// Output a string in RFC822Z format
carbon.Parse("2020-08-05 13:14:15").ToRfc822zString() // 05 Aug 20 13:14 +0800
carbon.Parse("2020-08-05 13:14:15").ToRfc822zString(carbon.Tokyo) // 05 Aug 20 14:14 +0900
// Output a string in RFC850 format
carbon.Parse("2020-08-05 13:14:15").ToRfc850String() // Wednesday, 05-Aug-20 13:14:15 CST
carbon.Parse("2020-08-05 13:14:15").ToRfc850String(carbon.Tokyo) // Wednesday, 05-Aug-20 14:14:15 JST
// Output a string in RFC1036 format
carbon.Parse("2020-08-05 13:14:15").ToRfc1036String() // Wed, 05 Aug 20 13:14:15 +0800
carbon.Parse("2020-08-05 13:14:15").ToRfc1036String(carbon.Tokyo) // Wed, 05 Aug 20 14:14:15 +0900
// Output a string in RFC1123 format
carbon.Parse("2020-08-05 13:14:15").ToRfc1123String() // Wed, 05 Aug 2020 13:14:15 CST
carbon.Parse("2020-08-05 13:14:15").ToRfc1123String(carbon.Tokyo) // Wed, 05 Aug 2020 14:14:15 JST
// Output a string in RFC1123Z format
carbon.Parse("2020-08-05 13:14:15").ToRfc1123zString() // Wed, 05 Aug 2020 13:14:15 +0800
carbon.Parse("2020-08-05 13:14:15").ToRfc1123zString(carbon.Tokyo) // Wed, 05 Aug 2020 14:14:15 0800
// Output a string in RFC2822 format
carbon.Parse("2020-08-05 13:14:15").ToRfc2822String() // Wed, 05 Aug 2020 13:14:15 +0800
carbon.Parse("2020-08-05 13:14:15").ToRfc2822String(carbon.Tokyo) // Wed, 05 Aug 2020 14:14:15 +0900
// Output a string in RFC3339 format
carbon.Parse("2020-08-05 13:14:15").ToRfc3339String() // 2020-08-05T13:14:15+08:00
carbon.Parse("2020-08-05 13:14:15").ToRfc3339String(carbon.Tokyo) // 2020-08-05T14:14:15+09:00
// Output a string in RFC7231 format
carbon.Parse("2020-08-05 13:14:15").ToRfc7231String() // Wed, 05 Aug 2020 13:14:15 GMT
carbon.Parse("2020-08-05 13:14:15").ToRfc7231String(carbon.Tokyo) // Wed, 05 Aug 2020 14:14:15 GMT

// Output a string in date and time format
fmt.Sprintf("%s", carbon.Parse("2020-08-05 13:14:15")) // 2020-08-05 13:14:15
fmt.Sprintf("%s", carbon.Parse("2020-08-05 13:14:15", carbon.Tokyo)) // 2020-08-05 13:14:15

// Output a string in "2006-01-02 15:04:05.999999999 -0700 MST" format
carbon.Parse("2020-08-05 13:14:15").ToString() // 2020-08-05 13:14:15 +0800 CST
carbon.Parse("2020-08-05 13:14:15").ToString(carbon.Tokyo) // 2020-08-05 14:14:15 +0900 JST

// Output a string by layout, Layout() is short for ToLayoutString()
carbon.Parse("2020-08-05 13:14:15").Layout("20060102150405") // 20200805131415
carbon.Parse("2020-08-05 13:14:15").Layout("2006年01月02日 15时04分05秒") // 2020年08月05日 13时14分15秒
carbon.Parse("2020-08-05 13:14:15").Layout("It is 2006-01-02 15:04:05") // It is 2020-08-05 13:14:15
carbon.Parse("2020-08-05 13:14:15").Layout("2006-01-02 15:04:05", carbon.Tokyo) // 2020-08-05 14:14:15

// Output a string by format, Format() is short for ToFormatString()
carbon.Parse("2020-08-05 13:14:15").Format("YmdHis") // 20200805131415
carbon.Parse("2020-08-05 13:14:15").Format("Y年m月d日 H时i分s秒") // 2020年08月05日 13时14分15秒
carbon.Parse("2020-08-05 13:14:15").Format("l jS \\o\\f F Y h:i:s A") // Wednesday 5th of August 2020 01:14:15 PM
carbon.Parse("2020-08-05 13:14:15").Format("\\I\\t \\i\\s Y-m-d H:i:s") // It is 2020-08-05 13:14:15
carbon.Parse("2020-08-05 13:14:15").Format("Y-m-d H:i:s", carbon.Tokyo) // 2020-08-05 14:14:15

For more supported format signs, please see the Format sign table

Constellation

// Get constellation name
carbon.Parse("2020-08-05 13:14:15").Constellation() // Leo

// Whether is Aries
carbon.Parse("2020-08-05 13:14:15").IsAries() // false
// Whether is Taurus
carbon.Parse("2020-08-05 13:14:15").IsTaurus() // false
// Whether is Gemini
carbon.Parse("2020-08-05 13:14:15").IsGemini() // false
// Whether is Cancer
carbon.Parse("2020-08-05 13:14:15").IsCancer() // false
// Whether is Leo
carbon.Parse("2020-08-05 13:14:15").IsLeo() // true
// Whether is Virgo
carbon.Parse("2020-08-05 13:14:15").IsVirgo() // false
// Whether is Libra
carbon.Parse("2020-08-05 13:14:15").IsLibra() // false
// Whether is Scorpio
carbon.Parse("2020-08-05 13:14:15").IsScorpio() // false
// Whether is Sagittarius
carbon.Parse("2020-08-05 13:14:15").IsSagittarius() // false
// Whether is Capricorn
carbon.Parse("2020-08-05 13:14:15").IsCapricorn() // false
// Whether is Aquarius
carbon.Parse("2020-08-05 13:14:15").IsAquarius() // false
// Whether is Pisces
carbon.Parse("2020-08-05 13:14:15").IsPisces() // false

Season

According to the meteorological division method, March to May is spring, June to August is summer, September to November is autumn, and December to February is winter

// Get season name
carbon.Parse("2020-08-05 13:14:15").Season() // Summer

// Start of the season
carbon.Parse("2020-08-05 13:14:15").StartOfSeason().ToDateTimeString() // 2020-06-01 00:00:00
// End of the season
carbon.Parse("2020-08-05 13:14:15").EndOfSeason().ToDateTimeString() // 2020-08-31 23:59:59

// Whether is spring
carbon.Parse("2020-08-05 13:14:15").IsSpring() // false
// Whether is summer
carbon.Parse("2020-08-05 13:14:15").IsSummer() // true
// Whether is autumn
carbon.Parse("2020-08-05 13:14:15").IsAutumn() // false
// Whether is winter
carbon.Parse("2020-08-05 13:14:15").IsWinter() // false

Chinese Lunar

Currently only 200 years from 1900 to 2100 are supported

// Get Chinese Lunar year of animal
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().Animal() // 鼠

// Get Chinese lunar festival
carbon.Parse("2021-02-12 13:14:15", carbon.PRC).Lunar().Festival() // 春节

// Get Chinese lunar year
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().Year() // 2020
// Get Chinese lunar month
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().Month() // 6
// Get Chinese lunar leap month
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().LeapMonth() // 4
// Get Chinese lunar day
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().Day() // 16
// Get Chinese lunar date as string in YYYY-MM-DD format
fmt.Sprintf("%s", carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar()) // 2020-06-16

// Get Chinese lunar year as string
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().ToYearString() // 二零二零
// Get Chinese lunar month as string
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().ToMonthString() // 六
// Get Chinese lunar day as string
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().ToDayString() // 十六
// Get Chinese lunar date as string
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().ToDateString() // 二零二零年六月十六

// Whether is a leap year
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsLeapYear() // true
// Whether is a leap month
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsLeapMonth() // false

// Whether is a year of the rat
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsRatYear() // true
// Whether is a year of the ox
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsOxYear() // false
// Whether is a year of the tiger
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsTigerYear() // false
// Whether is a year of the rabbit
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsRabbitYear() // false
// Whether is a year of the dragon
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsDragonYear() // false
// Whether is a year of the snake
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsSnakeYear() // false
// Whether is a year of the horse
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsHorseYear() // false
// Whether is a year of the goat
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsGoatYear() // false
// Whether is a year of the monkey
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsMonkeyYear() // false
// Whether is a year of the rooster
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsRoosterYear() // false
// Whether is a year of the dog
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsDogYear() // false
// Whether is a year of the dig
carbon.Parse("2020-08-05 13:14:15", carbon.PRC).Lunar().IsPigYear() // false

JSON handling

Define model

type Person struct {
    ID  int64  `json:"id"`
    Name string `json:"name"`
    Age int `json:"age"`
    Birthday carbon.ToDateTimeString `json:"birthday"`
    GraduatedAt carbon.ToDateString `json:"graduated_at"`
    CreatedAt carbon.ToTimeString `json:"created_at"`
    UpdatedAt carbon.ToTimestamp `json:"updated_at"`
    DateTime1 carbon.ToTimestampWithSecond `json:"date_time1"`
    DateTime2 carbon.ToTimestampWithMillisecond `json:"date_time2"`
    DateTime3 carbon.ToTimestampWithMicrosecond `json:"date_time3"`
    DateTime4 carbon.ToTimestampWithNanosecond `json:"date_time4"`
}

Instantiate model

person := Person {
	ID:          1,
	Name:        "gouguoyin",
	Age:         18,
	Birthday:    carbon.ToDateTimeString{carbon.Now().SubYears(18)},
	GraduatedAt: carbon.ToDateString{carbon.Parse("2020-08-05 13:14:15")},
	CreatedAt:   carbon.ToTimeString{carbon.Parse("2021-08-05 13:14:15")},
	UpdatedAt:   carbon.ToTimestamp{carbon.Parse("2022-08-05 13:14:15")},
	DateTime1:   carbon.ToTimestampWithSecond{carbon.Parse("2023-08-05 13:14:15")},
	DateTime2:   carbon.ToTimestampWithMillisecond{carbon.Parse("2024-08-05 13:14:15")},
	DateTime3:   carbon.ToTimestampWithMicrosecond{carbon.Parse("2025-08-05 13:14:15")},
	DateTime4:   carbon.ToTimestampWithNanosecond{carbon.Parse("2025-08-05 13:14:15")},
}

JSON encode

data, err := json.Marshal(&person)
if err != nil {
	t.Fatal(err)
}
fmt.Printf("%s",data)
// output
{
	"id":1,
	"name":"gouguoyin",
	"age":18,
	"birthday":"2003-07-16 16:22:02",
	"graduated_at":"2020-08-05",
	"created_at":"13:14:15",
	"updated_at":1659676455,
	"date_time1":1691212455,
	"date_time2":1722834855000,
	"date_time3":1754370855000000,
	"date_time4":1754370855000000000
}

JSON decode

jsonString := `{
	"id":1,
	"name":"gouguoyin",
	"age":18,
	"birthday":"2003-07-16 16:22:02",
	"graduated_at":"2020-08-05",
	"updated_at":1659676455,
	"date_time1":1691212455,
	"date_time2":1722834855000,
	"date_time3":1754370855000000,
	"date_time4":1754370855000000000
}`
person := new(Person)
err := json.Unmarshal([]byte(jsonString), &person)
if err != nil {
	t.Fatal(err)
}
fmt.Printf("%+v", *person)
// output
{ID:1 Name:gouguoyin Age:18 Birthday:2003-07-16 16:22:02 GraduatedAt:2020-08-05 00:00:00 UpdatedAt:2022-08-05 13:14:15 DTime1:2023-08-05 13:14:15 DateTime2:2024-08-05 13:14:15 DateTime3:2025-08-05 13:14:15 DateTime4:2025-08-05 13:14:15}

I18n

The following languages are supported

• Simplified Chinese(zh-CN)
• Traditional Chinese(zh-TW)
• English(en)
• Japanese(jp)
• Korean(kr)
• Spanish(es)：translated by hgisinger
• German(de)：translated by benzammour
• Turkish(tr): translated by emresenyuva

The following methods are supported

• Constellation()：get constellation name
• Season()：get season name
• DiffForHumans()：get the difference in human friendly readable format
• ToMonthString()：output a string in month format
• ToShortMonthString()：output a string in short month format
• ToWeekString()：output a string in week format
• ToShortWeekString()：output a string in short week format

Set locale

lang := NewLanguage()
if err := lang.SetLocale("zh-CN");err != nil {
    // Error handle...
    log.Fatal(err)
}

c := carbon.SetLanguage(lang)
c.Now().AddHours(1).DiffForHumans() // 1 小时后
c.Now().AddHours(1).ToMonthString() // 八月
c.Now().AddHours(1).ToShortMonthString() // 8月
c.Now().AddHours(1).ToWeekString() // 星期二
c.Now().AddHours(1).ToShortWeekString() // 周二
c.Now().AddHours(1).Constellation() // 狮子座
c.Now().AddHours(1).Season() // 夏季

Reset some resources(the rests still translate from the given locale)

lang := NewLanguage()

if err := lang.SetLocale("en");err != nil {
	// Error handle...
    log.Fatal(err)
}

resources := map[string]string {
    "hour":"%dh",
}
lang.SetResources(resources)

c := carbon.SetLanguage(lang)
c.Now().AddYears(1).DiffForHumans() // 1 year from now
c.Now().AddHours(1).DiffForHumans() // 1h from now
c.Now().ToMonthString() // August
c.Now().ToShortMonthString() // Aug
c.Now().ToWeekString() // Tuesday
c.Now().ToShortWeekString() // Tue
c.Now().Constellation() // Leo
c.Now().Season() // Summer

Reset all resources

lang := NewLanguage()
resources := map[string]string {
    "months": "January|February|March|April|May|June|July|August|September|October|November|December",
    "months_short": "Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec",
    "weeks": "Sunday|Monday|Tuesday|Wednesday|Thursday|Friday|Saturday",
    "weeks_short": "Sun|Mon|Tue|Wed|Thu|Fri|Sat",
    "seasons": "Spring|Summer|Autumn|Winter",
    "constellations": "Aries|Taurus|Gemini|Cancer|Leo|Virgo|Libra|Scorpio|Sagittarius|Capricornus|Aquarius|Pisce",
    "year":"1 yr|%d yrs",
    "month":"1 mo|%d mos",
    "week":"%dw",
    "day":"%dd",
    "hour":"%dh",
    "minute":"%dm",
    "second":"%ds",
    "now": "just now",
    "ago":"%s ago",
    "from_now":"in %s",
    "before":"%s before",
    "after":"%s after",
}
lang.SetResources(resources)

c := carbon.SetLanguage(lang)
c.Now().AddYears(1).DiffForHumans() // in 1 yr
c.Now().AddHours(1).DiffForHumans() // in 1h
c.Now().ToMonthString() // August
c.Now().ToShortMonthString() // Aug
c.Now().ToWeekString() // Tuesday
c.Now().ToShortWeekString() // Tue
c.Now().Constellation() // Leo
c.Now().Season() // Summer

Error handling

If more than one error occurs, only the first error is returned

Scene one

c := carbon.SetTimezone(PRC).Parse("xxx")
if c.Error != nil {
    // Error handle...
    log.Fatal(c.Error)
}
fmt.Println(c.ToDateTimeString())
// Output
cannot parse "xxx" as carbon, please make sure the value is valid

Scene two

c := carbon.SetTimezone("xxx").Parse("2020-08-05")
if c.Error != nil {
    // Error handle...
    log.Fatal(c.Error)
}
fmt.Println(c.ToDateTimeString())
// Output
invalid timezone "xxx", please see the file "$GOROOT/lib/time/zoneinfo.zip" for all valid timezones

Scene three

c := carbon.SetTimezone("xxx").Parse("12345678")
if c.Error != nil {
    // Error handle...
    log.Fatal(c.Error)
}
fmt.Println(c.ToDateTimeString())
// Output
invalid timezone "xxx", please see the file "$GOROOT/lib/time/zoneinfo.zip" for all valid timezones

Appendix

Format sign table

sign	desc	length	range	example
d	Day of the month, 2 digits with leading zeros	2	01-31	05
D	A textual representation of a day, three letters	3	Mon-Sun	Wed
j	Day of the month without leading zeros	-	1-31	5
S	English ordinal suffix for the day of the month, 2 characters. Eg: st, nd, rd or th. Works well with j	2	st/nd/rd/th	th
l	A full textual representation of the day of the week	-	Monday-Sunday	Wednesday
F	A full textual representation of a month	-	January-December	August
m	Numeric representation of a month, with leading zeros	2	01-12	08
M	A short textual representation of a month, three letters	3	Jan-Dec	Aug
n	Numeric representation of a month, without leading zeros	-	1-12	8
y	A two digit representation of a year	2	00-99	20
Y	A full numeric representation of a year, 4 digits	4	0000-9999	2020
a	Lowercase morning or afternoon sign	2	am/pm	pm
A	Uppercase morning or afternoon sign	2	AM/PM	PM
g	12-hour format of an hour without leading zeros	-	1-12	1
G	24-hour format of an hour without leading zeros	-	0-23	15
h	12-hour format of an hour with leading zeros	2	00-11	03
H	24-hour format of an hour with leading zeros	2	00-23	15
i	Minutes with leading zeros	2	01-59	14
s	Seconds with leading zeros	2	01-59	15
c	ISO 8601 date	-	-	2020-08-05T15:19:21+00:00
r	RFC 2822 date	-	-	Thu, 21 Dec 2020 16:01:07 +0200
O	Difference to Greenwich time (GMT) without colon between hours and minutes	-	-	+0200
P	Difference to Greenwich time (GMT) with colon between hours and minutes	-	-	+02:00
T	Timezone abbreviation	-	-	EST
W	ISO8601 numeric representation of the week of the year	-	1-52	42
N	ISO8601 numeric representation of the day of the week	1	1-7	6
L	Whether it's a leap year	1	0-1	1
U	Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)	10	-	1611818268
u	Millisecond	3	-	999
w	Numeric representation of the day of the week	1	0-6	6
t	Total days of the month	2	28-31	30
z	Day of the year	-	0-365	15
e	Location	-	-	America/New_York
Q	Quarter	1	1-4	1
C	Century	-	0-99	21

References

• briannesbitt/carbon
• jinzhu/now
• goframe/gtime
• arrow-py/arrow
• moment/moment
• iamkun/dayjs