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Go supports time formatting and parsing via pattern-based layouts. 

    






    
    
        
    

    






    
    
package main

    






    
    
        
    

    






    
    
import (

    






    
    
	"fmt"

    






    
    
	"time"

    






    
    
)

    






    
    
        
    

    






    
    
func main() {

    






    
    
	p := fmt.Println

    






    
    
        
    

    






    
    
         Here's a basic example of formatting a time according to RFC3339, using the corresponding layout constant.
    
	t := time.Now()

    






    
    
	p(t.Format(time.RFC3339))

    
2020-10-21T16:47:41Z







    
    
        
    

    






    
    
         Time parsing uses the same layout values as `Format`.
    
	t1, e := time.Parse(

    






    
    
		time.RFC3339,

    






    
    
		"2012-11-01T22:08:41+00:00")

    






    
    
	p(t1)

    






    
    
        
    

    






    
    
         `Format` and `Parse` use example-based layouts. Usually you'll use a constant from `time` for these layouts, but you can also supply custom layouts. Layouts must use the reference time `Mon Jan 2 15:04:05 MST 2006` to show the pattern with which to format/parse a given time/string. The example time must be exactly as shown: the year 2006, 15 for the hour, Monday for the day of the week, etc.
    
	p(t.Format("3:04PM"))

    






    
    
	p(t.Format("Mon Jan _2 15:04:05 2006"))

    






    
    
	p(t.Format("2006-01-02T15:04:05.999999-07:00"))

    






    
    
	form := "3 04 PM"

    






    
    
	t2, e := time.Parse(form, "8 41 PM")

    






    
    
	p(t2)

    






    
    
        
    

    






    
    
         For purely numeric representations you can also use standard string formatting with the extracted components of the time value.
    
	fmt.Printf("%d-%02d-%02dT%02d:%02d:%02d-00:00\n",

    






    
    
		t.Year(), t.Month(), t.Day(),

    






    
    
		t.Hour(), t.Minute(), t.Second())

    






    
    
        
    

    






    
    
         `Parse` will return an error on malformed input explaining the parsing problem.
    
	ansic := "Mon Jan _2 15:04:05 2006"

    






    
    
	_, e = time.Parse(ansic, "8:41PM")

    






    
    
	p(e)

    
2020-10-21T16:47:48Z
2012-11-01 22:08:41 +0000 UTC
4:47PM
Wed Oct 21 16:47:48 2020
2020-10-21T16:47:48.510619+00:00
0000-01-01 20:41:00 +0000 UTC
2020-10-21T16:47:48-00:00
parsing time "8:41PM" as "Mon Jan _2 15:04:05 2006": cannot parse "8:41PM" as "Mon"







    
    
}

    
2020-10-21T16:47:48.731539+00:00







    
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