til/Development/Go/time.md

time

To parse string to time in golang, must define layout first.

Read default layouts in Constants.

The reference time:

Mon Jan 2 15:04:05 MST 2006

To define your layout, rewrite reference time in your layout.

Example time.Parse from string to time.Time:

layout := "2006-01-02 15:04:05"

t, err := time.Parse(layout, "2020-06-09 23:04:02")
if err != nil {
    log.Fatal(err)
}

fmt.Println(t)

Example time.ParseInLocation from string to time.Time with location:

layout := "2006-01-02 15:04:05"

loc, err := time.LoadLocation("Asia/Ho_Chi_Minh")
if err != nil {
    log.Fatal(err)
}

t, err := time.ParseInLocation(layout, "2020-06-09 23:04:02", loc)
if err != nil {
    log.Fatal(err)
}

fmt.Println(t)

Example Format from time.Time to string:

now := time.Now()

layout := "2006-01-02"
fmt.Println(now.Format(layout))

Example Format from time.Time to string with location:

loc, err := time.LoadLocation("Asia/Ho_Chi_Minh")
if err != nil {
    return "", err
}

now := time.Now().In(loc)

layout := "2006-01-02"
fmt.Println(now.Format(layout))

Example time.Unix from timestamp ms to time.Time:

time.Unix(0, timestamp * int64(time.Millisecond))