Golang formatting and parsing of ISO 8601 dates, times, and time zones.

iso8601_datetime.go

// This snippet demonstrates Golang formatting and parsing of 
// ISO 8601 dates, times, time zones

import(
    "fmt"
    "time"
)

loc, _ := time.LoadLocation("America/Los_Angeles")

// Our example date/time:
// 2020-01-01T15:30:10.693-08:00
t := time.Date(2020, 1, 1, 15, 30, 10, 693000000, loc)

fmt.Println(t.Format("2006"))
// 2020

fmt.Println(t.Format("2006-01"))
// 2020-01

fmt.Println(t.Format("2006-01-02"))
// 2020-01-01

fmt.Println(t.Format("15:04"))
// 15:30

fmt.Println(t.Format("15:04:05"))
// 15:30:10

fmt.Println(t.Format("15:04:05.000"))
// 15:30:10.693

fmt.Println(t.Format("15:04:05.000-07"))
// 15:30:10.693-08

fmt.Println(t.Format("15:04:05.000-07:00"))
// 15:30:10.693-08:00

fmt.Println(t.Format(time.RFC3339))
// 2020-01-01T15:30:10-08:00