Go Time and Duration | Programming Tutorials

$ go run time.go

2012-10-31 15:50:13.793654 +0000 UTC

2009-11-17 20:34:58.651387237 +0000 UTC

2009

November

17

20

34

58

651387237

UTC

Tuesday

true

false

false

25891h15m15.142266763s

25891.25420618521

1.5534752523711128e+06

9.320851514226677e+07

93208515142266763

2012-10-31 15:50:13.793654 +0000 UTC

2006-12-05 01:19:43.509120474 +0000 UTC



# Next we'll look at the related idea of time relative to

# the Unix epoch.

// Go offers extensive support for times and durations;

// here are some examples.



package main



import (

    "fmt"

    "time"

)



func main() {

    p := fmt.Println



    // We'll start by getting the current time.

    now := time.Now()

    p(now)



    // You can build a `time` struct by providing the

    // year, month, day, etc. Times are always associated

    // with a `Location`, i.e. time zone.

    then := time.Date(

        2009, 11, 17, 20, 34, 58, 651387237, time.UTC)

    p(then)



    // You can extract the various components of the time

    // value as expected.

    p(then.Year())

    p(then.Month())

    p(then.Day())

    p(then.Hour())

    p(then.Minute())

    p(then.Second())

    p(then.Nanosecond())

    p(then.Location())



    // The Monday-Sunday `Weekday` is also available.

    p(then.Weekday())



    // These methods compare two times, testing if the

    // first occurs before, after, or at the same time

    // as the second, respectively.

    p(then.Before(now))

    p(then.After(now))

    p(then.Equal(now))



    // The `Sub` methods returns a `Duration` representing

    // the interval between two times.

    diff := now.Sub(then)

    p(diff)



    // We can compute the length of the duration in

    // various units.

    p(diff.Hours())

    p(diff.Minutes())

    p(diff.Seconds())

    p(diff.Nanoseconds())



    // You can use `Add` to advance a time by a given

    // duration, or with a `-` to move backwards by a

    // duration.

    p(then.Add(diff))

    p(then.Add(-diff))

}