Convert time between different timezones in Go (Golang)

Every time.Time object has an associated location value. When you change the location of any time.Time object to any other location, then that instant of time is not changed. Only the location value associated with that time changes. The location associated with the time.Time object only has a presentation or display logic.

The In function can be used to change the location associated with a particular time.Time object. Whenever the In function is called on any time.Time object (say t) then,

• A copy of t is created representing the same time instant.
• t’s location is set to the location passed to In function for display purposes
• t is returned back

Let’s see the below-working code which can be used to change the location value associated with a particular time.

package main

import (
    "fmt"
    "time"
)

func main() {
    now := time.Now()

    loc, _ := time.LoadLocation("UTC")
    fmt.Printf("UTC Time: %s\n", now.In(loc))
   
    loc, _ = time.LoadLocation("Europe/Berlin")
    fmt.Printf("Berlin Time: %s\n", now.In(loc))

    loc, _ = time.LoadLocation("America/New_York")
    fmt.Printf("New York Time: %s\n", now.In(loc))

    loc, _ = time.LoadLocation("Asia/Dubai")
    fmt.Printf("Dubai Time: %s\n", now.In(loc))
}

Output:

UTC Time: 2020-01-31 18:09:41.705858 +0000 UTC
Berlin Time: 2020-01-31 19:09:41.705858 +0100 CET
New York Time: 2020-01-31 13:09:41.705858 -0500 EST
Dubai Time: 2020-01-31 22:09:41.705858 +0400 +04