このツールとは？
See the days, hours, minutes and seconds remaining until a target date and time.
なぜ使う？
Useful when you want to see how long until an event, deadline, exam, or anniversary, or when you need a timer for a waiting screen or presentation.
使い方
Enter your target date and time. Enable milliseconds if needed. The display stays at zero after the target time passes.
Calculations use your device clock without server synchronization. Browsers may slow display updates when a tab is inactive.