这是什么工具？
See the days, hours, minutes and seconds remaining until a target date and time.
为什么使用？
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.
如何使用
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.