Go Time

Go has very good support for the time manipulations. Unix epoch time is used as reference for time manipulations.

we can built a time object by using Date method provided in the time package. The package contains methods like year(), month(), day(), location() etc.

We invoke these methods by using time object.

Go Time Example

package main

import "fmt"
import "time"

func main() {
	p := fmt.Println

	present := time.Now()// current time
	p(present)

	DOB := time.Date(1993, 02, 28, 9,04,39,213 ,time.Local)
	fmt.Println(DOB)

	fmt.Println(DOB.Year())
	fmt.Println(DOB.Month())
	fmt.Println(DOB.Day())
	fmt.Println(DOB.Hour())
	fmt.Println(DOB.Minute())
	fmt.Println(DOB.Second())
	fmt.Println(DOB.Nanosecond())
	fmt.Println(DOB.Location())

	fmt.Println(DOB.Weekday())

	fmt.Println(DOB.Before(present))
	fmt.Println(DOB.After(present))
	fmt.Println(DOB.Equal(present))

	diff := present.Sub(DOB)
	fmt.Println(diff)
	fmt.Println(diff.Hours())
	fmt.Println(diff.Minutes())
	fmt.Println(diff.Seconds())
	fmt.Println(diff.Nanoseconds())
	fmt.Println(DOB.Add(diff))
	fmt.Println(DOB.Add(-diff))
}

Output:

2017-10-04 17:10:13.474931994 +0530 IST m=+0.000334969
1993-02-28 09:04:39.000000213 +0530 IST
1993
February
28
9
4
39
213
Local
Sunday
true
false
false
215624h5m34.474931781s
215624.09290970326
1.2937445574582197e+07
7.762467344749318e+08
776246734474931781
2017-10-04 17:10:13.474931994 +0530 IST
1968-07-25 00:59:04.525068432 +0530 IST

Process finished with exit code 0

Go Time Example 2

package main
import (
	"fmt"
	"time"
)
func main() {
	present := time.Now()
	fmt.Println("Today : ", present.Format("Mon, Jan 2, 2006 at 3:04pm"))
	someTime := time.Date(2017, time.March, 30, 11, 30, 55, 123456, time.Local)
	// compare time with time.Equal()
	sameTime := someTime.Equal(present)
	fmt.Println("someTime equals to now ? : ", sameTime)
	// calculate the time different between today
	// and long time ago
	diff := present.Sub(someTime)
	// convert diff to days
	days := int(diff.Hours() / 24)
	fmt.Printf("30th March 2017 was %d days ago \n", days)
}

Output:

Today :  Wed, Oct 4, 2017 at 5:15pm
someTime equals to now ? :  false
30th March 2017 was 188 days ago

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