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JavaScriptでnew Dateのmsにzをつけた際の挙動

More than 1 year has passed since last update.

1995-12-17T03:24:00z か 1995-12-17T03:24:00で new Dateの結果が違う

初めて知りましたが、msにzかZをつけてあげるとパースの際にタイムゾーンに合わせた時間にしてくれるみたいです。

// 9時間足してくれる
1995-12-17T03:24:00z
 Sun Dec 17 1995 12:24:00


// 9時間足してくれない
1995-12-17T03:24:00
 Sun Dec 17 1995 03:24:00

Zをつけるとパースの際にUTC時刻だと判定するみたいです。
しゅごい:relaxed:

この日付フォーマットを ISO 8601 というらしいです。

ECMA Scriptの仕様書はこちら

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