===== Go time layout reference =====

==== Rule ====
Go uses a special reference date/time to define layouts for `time.Format()` and `time.Parse()`.

Reference time:
  * `Mon Jan 2 15:04:05 MST 2006`

Common numeric form:
  * `2006-01-02 15:04:05`

==== Meaning of digits ====
  * `2006` = year
  * `01` = month
  * `02` = day
  * `15` = hour (24h)
  * `04` = minute
  * `05` = second

==== Example ====
<code go>
layout := "2006-01-02 15:04:05"
t, _ := time.Parse(layout, "2026-01-09 10:30:00")
fmt.Println(t.Format(layout))
</code>

==== Notes ====
  * `YYYY-MM-DD` is NOT valid in Go layouts.
  * Use `time.RFC3339` for APIs when possible.

==== Hard words (English) ====
  * **reference** /ˈrefərens/: tham chiếu
  * **layout** /ˈleɪaʊt/: mẫu định dạng
  * **represent** /ˌreprɪˈzent/: đại diện
  * **placeholder** /ˈpleɪsˌhoʊldər/: ký hiệu thay thế