カウントダウンタイマー
任意のタイムゾーンの任意の日時までカウントダウンできます。
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この瞬間の世界時刻
使い方
Set a target date and time, pick the city whose local time defines the moment, and give the countdown a title if you like. The display updates every second, works full screen for events and streams, and respects your system's reduced-motion preference.
よくある質問
Why can I choose a time zone for the target?
A “new year in Tokyo” happens at a different instant than “new year in New York”. Fixing the target to a zone makes the countdown identical for every viewer, wherever they are.
What happens when the target time passes?
The timer switches to counting up, showing how much time has passed since the target — handy for “days since launch” style counters.
Can I share a countdown?
Yes. The share button creates a link containing the target date, time, zone and title, so anyone opening it sees the same countdown.