Just a collection of some time and date manipulation functions in Go

goTimeManipulation.go

package main

import (
	"fmt"
	"time"
)

func main() {
	//// Get the current time.
	myTime := time.Now() // get current time
	fmt.Println("Current time in ", myTime.Location(), " is: ", myTime)
	// Another way to get local time
	location, _ := time.LoadLocation("Local") // LoadLocation("") also returns sets location to local
	fmt.Println("Current time in ", location, " is: ", time.Now().In(location))
	// change location to New York
	location, _ = time.LoadLocation("America/New_York")
	fmt.Println("Current time in ", location, " is: ", myTime.In(location))
	// get time in Mountain Time Zone(MST)
	location, _ = time.LoadLocation("MST")
	fmt.Println("Current time in ", location, " is: ", myTime.In(location))
	//// Using the Date() function.
	year, month, day := myTime.Date()
	fmt.Println("Year   :", year)
	fmt.Println("Month  :", month)
	fmt.Println("Day    :", day)
	//using the Clock() function
	hour, min, sec := myTime.Clock()
	fmt.Println("Hour    :", hour)
	fmt.Println("Minute  :", min)
	fmt.Println("Seconds :", sec)
	//// using the function for each individual components of the time from Year to Nanosecond
	fmt.Println("Year   :", myTime.Year())
	fmt.Println("Month  :", myTime.Month())
	fmt.Println("Day    :", myTime.Day())
	fmt.Println("Hour    :", myTime.Hour())
	fmt.Println("Minute  :", myTime.Minute())
	fmt.Println("Seconds :", myTime.Second())
	fmt.Println("Nanosecond :", myTime.Nanosecond())
	get individual components of the time from Year to Nanosecond from a specific date
	yourTime := time.Date(2020, 07, 1, 06, 32, 10, 0, time.UTC)
	fmt.Println("Year   :", yourTime.Year())
	fmt.Println("Month  :", yourTime.Month())
	fmt.Println("Day    :", yourTime.Day())
	fmt.Println("Hour    :", yourTime.Hour())
	fmt.Println("Minute  :", yourTime.Minute())
	fmt.Println("Seconds :", yourTime.Second())
	fmt.Println("Nanosecond :", yourTime.Nanosecond())
	// get time using Clock() function
	yourHour, yourMin, yourSec := yourTime.Clock()
	fmt.Println("Hour    :", yourHour)
	fmt.Println("Minute  :", yourMin)
	fmt.Println("Seconds :", yourSec)
	// get time and date from string
	dateString := "2021-09-05 07:35:20"
	layout := "2006-01-02 15:04:05"
	yourTime, _ = time.Parse(layout, dateString)
	fmt.Println("Your time is: ", yourTime)
	fmt.Println("Year   :", yourTime.Year())
	fmt.Println("Month  :", yourTime.Month())
	fmt.Println("Day    :", yourTime.Day())
	fmt.Println("Hour    :", yourTime.Hour())
	fmt.Println("Minute  :", yourTime.Minute())
	fmt.Println("Seconds :", yourTime.Second())
	curTime := time.Now()
	//add one hour to the time
	curTime = curTime.Add(time.Hour)
	fmt.Println("Current time is: ", curTime)
	// Add one day to the time
	tomorrow := curTime.Add(time.Hour * 24)
	fmt.Println("This time tomorrow is: ", tomorrow)
	// add one week to a time using Add()
	nextWeek := curTime.Add(time.Hour * 24 * 7)
	fmt.Println("This time next week is: ", nextWeek)
	// add two days using the AddDate() function
	nextTomorrow := curTime.AddDate(0, 0, 2)
	fmt.Println("This time Next tomorrow is: ", nextTomorrow)
	// add one month using AddDate()
	nextMonth := curTime.AddDate(0, 1, 0)
	fmt.Println("This time next month is: ", nextMonth)
	// add five years using AddDate()
	fiveYearsAndOneMonthAfter := curTime.AddDate(5, 1, 0)
	fmt.Println("This time five years and one month after is: ", fiveYearsAndOneMonthAfter)
	yesterday := curTime.AddDate(0, 0, -1)
	fmt.Println("This time yesterday was: ", yesterday)
	// subtract one month using Add()
	lastMonth := curTime.Add(time.Hour * -24 * 30)
	fmt.Println("This time last month was: ", lastMonth)
	get difference between two dates
	past := time.Date(2022, time.December, 25, 12, 0, 0, 0, time.UTC)
	diff := past.Sub(curTime)
	fmt.Println("Difference between now and the past is: ", diff)
	// get the difference in various units
	years := int(diff.Hours() / 24 / 365)
	fmt.Println("Years: ", years)
	months := int(diff.Hours() / 24 / 30)
	fmt.Println("Months: ", months)
	days := int(diff.Hours() / 24)
	fmt.Println("Days: ", days)
	hours := int(diff.Hours())
	fmt.Println("Hours: ", hours)
	minutes := int(diff.Minutes())
	fmt.Println("Minutes: ", minutes)
	seconds := int(diff.Seconds())
	fmt.Println("Seconds: ", seconds)
	milliseconds := int(diff.Milliseconds())
	fmt.Println("Milliseconds: ", milliseconds)
	
	// Get time and date in various formats
	fmt.Println("Current time is: ", curTime)
	// built-in standard formatting  styles
	fmt.Println("Current time is: ", curTime)
	fmt.Println("Current time in RFC3339 format is: ", curTime.Format(time.RFC3339))
	fmt.Println("Current time in RFC3339Nano format is: ", curTime.Format(time.RFC3339Nano))
	fmt.Println("Current time in RFC1123 format is: ", curTime.Format(time.RFC1123))
	fmt.Println("Current time in RFC1123Z format is: ", curTime.Format(time.RFC1123Z))
	fmt.Println("Current time in RFC822 format is: ", curTime.Format(time.RFC822))
	fmt.Println("Current time in RFC822Z format is: ", curTime.Format(time.RFC822Z))
	fmt.Println("Current time in RFC850 format is: ", curTime.Format(time.RFC850))
	fmt.Println("Current time in ANSIC format is: ", curTime.Format(time.ANSIC))
	fmt.Println("Current time in Unix format is: ", curTime.Format(time.UnixDate))
	// custom formatting styles
	// DD-MM-YYYY HH:MM:SS
	fmt.Println("Current time in custom format is: ", curTime.Format("02-01-2006 15:04:05"))
	// MM-DD-YYYY HH:MM:SS
	fmt.Println("Current time in custom format is: ", curTime.Format("01-02-2006 15:04:05"))
	// YYYY-MM-DD HH:MM:SS
	fmt.Println("Current time in custom format is: ", curTime.Format("2006-01-02 15:04:05"))
	// DD.MM.YYYY
	fmt.Println("Current time in custom format is: ", curTime.Format("02.01.2006"))
	// DD/MM/YYYY
	fmt.Println("Current time in custom format is: ", curTime.Format("02/01/2006"))
	// 01 Feb 2006
	fmt.Println("Current time in custom format is: ", curTime.Format("02 Jan 2006"))
	// 01 February 2006 Monday
	fmt.Println("Current time in custom format is: ", curTime.Format("02 February 2006 Monday"))
	// 01 February 2006 Mon 15:04:05
	fmt.Println("Current time in custom format is: ", curTime.Format("02 February 2006 Mon 15:04:05"))
}