golang で timezone 変更

main.go

package main

import (
        "fmt"
        "time"
)

func main() {
	now := time.Now()
	// current timezone & offset
	zone, offset := time.Now().In(time.Local).Zone()
	fmt.Println(zone, offset)
	fmt.Println(now)

	// UTC
	loc, _ := time.LoadLocation("UTC")
	zone, offset = time.Now().In(loc).Zone()
	fmt.Println(zone, offset)
	fmt.Println(now.In(loc))
	
	// FixedZone to EST
	loc, _ = time.LoadLocation("America/New_York")
	zone, offset = time.Now().In(loc).Zone()
	loc = time.FixedZone(zone, offset)
	fmt.Println(zone, offset)
	fmt.Println(now.In(loc))
}

main.go.md

$ go run main.go
JST 32400
2016-02-12 16:41:00.361450035 +0900 JST
UTC 0
2016-02-12 07:41:00.361450035 +0000 UTC
EST -18000
2016-02-12 02:41:00.361450035 -0500 EST