Most programming languages use an alphabetic layout eg. yyyy-MM-dd to represent the time format. In Go, a time format is based on a layout that references this "" date Mon Jan 2 15:04:05 MST 2006, in which each time component is represented by a magical value in the reference date.
Parse date string 26 Jul 2020 13:47:56 PDT to a Go time struct value.
datestr := "26 Jul 2020 13:47:56 PDT"
layout := "2 Jan 2006 15:04:05 MST"
date, err := time.Parse(layout, datestr)or use a pre-defined layout.
datestr = "2021-01-27T12:08:38.093906-08:00"
layout = time.RFC3339Nano
date, err = time.Parse(layout, datestr)Print Go time struct value as Sun, 26 Jul 2020 13:47:56 PDT.
date := time.Date(2020, 7, 26, 13, 47, 56, 0, time.UTC)
layout := "Mon, 2 Jan 2006 15:04:05 MST"
fmt.Println(date.Format(layout))So let's suppose we have the following timestamp 26 Jul 2020 13:47:56. Here are the notations you would to display the timestamp in the formats you want:
| Expected output | Go notation | Standard | Go Const |
|---|---|---|---|
| 26 Jul 20 13:47 PDT | 02 Jan 06 15:04 MST | RFC822 | time.RFC822 |
| 26 Jul 20 13:47 -0700 | 02 Jan 06 15:04 -0700 | RFC822 | time.RFC822Z |
| Sun, 26 Jul 2020 13:47:56 PDT | Mon, 2 Jan 2006 15:04:05 MST | RFC 1123 | time.RFC1123 |
| Sun, 26 Jul 2020 13:47:56 -0700 | Mon, 2 Jan 2006 15:04:05 -0700 | RFC 1123 | time.RFC1123Z |
| 2020-07-26T13:47:56-0700 | 2006-01-02T15:04:05Z07:00 | RFC3339 | time.RFC3339 |
| 2020-07-26T13:47:56.093906-07:00 | 2006-01-02T15:04:05.999999999Z07:00 | RFC3339 | time.RFC3339Nano |
When the datetime string representation does not include the timezone, the UTC timezone is assumed. For example, the following will be parsed as 2020-07-26 13:47:56 +0000 UTC.
| Expected output |
|---|
| 2020-07-26T13:47:56 |
| 26 Jul 2020 13:47:56 |
| Expected output | Go notation | Java notation | C notation | Standard |
|---|---|---|---|---|
| 2020-07-26 | 2006-01-02 | yyyy-MM-dd | %F | ISO 8601 |
| 20200726 | 20060102 | yyyyMMdd | %Y%m%d | ISO 8601 |
| July 26, 2020 | January 02, 2006 | MMMM dd, yyyy | %B %d, %Y | |
| 26 Jul, 2020 | 02 Jan, 2006 | dd MMM, yyyy | %d %B, %Y | |
| 07/26/20 | 01/02/06 | MM/dd/yy | %D | |
| 07/26/2020 | 01/02/2006 | MM/dd/yyyy | %m/%d/%Y | |
| Sunday | Monday | EEEE | %A | |
| Sun | Mon | EEE | %a |
| Expected output | Go notation | Java notation | C notation | Standard |
|---|---|---|---|---|
| 13:47 | 15:04 | HH:mm | %R | |
| 13:47:56 | 15:04:05 | HH:mm:ss | %T | ISO 8601 |
| 1:47 PM | 3:04 PM | K:mm a | %l:%M %p | |
| 01:47:56 PM | 03:04:05 PM | KK:mm:ss a | %r |
You can define the time zone of a time value using the time.Location struct. Typically, you will call the LoadLocation function with a passed name, which corresponds to the TZ database name found in the IANA Time Zone database, eg. America/Los_Angeles. See list of TZ database time zones for details. The LoadLocation function also accepts "Local" as a valid name and loads the local location.