#Go言語 ```go // これは固定値 const FORMAT = "2006-01-02T15:04:05-0700" t, _ := time.Parse(FORMAT, "2022-01-11T09:00:00+0900") unixTime := t.Unix() fmt.Print(unixTime) // 1641859200 ``` - [Playground](https://go.dev/play/p/jwWd6gHU5RS)