We answer everyday questions about time and dates — quickly, accurately and for free.
What you can do here
- Online timers from 5 seconds to 24 hours, with sound alerts and full-screen mode.
- Countdowns to holidays and events.
- Date tools: age calculator, days between dates, day of the week and more.
- A stopwatch with lap times.
How the numbers are calculated
Holiday dates are computed with published rules — for example, US Thanksgiving is the fourth Thursday of November and Easter follows the Gregorian computus. Jewish holidays are calculated from the Hebrew calendar, Chinese festivals from the Hong Kong Observatory's lunar calendar tables, Islamic holidays from the Umm al-Qura calendar, and Hindu festivals come from published panchang calendars. Live values such as "days left" are calculated in your browser using your device's clock and time zone.
Religious holidays that depend on moon sighting may be observed a day earlier or later in your community. If you notice an error, please let us know.
Privacy
Timers and calculators run entirely in your browser — nothing you type is sent to our servers. See our Privacy Policy for details about analytics and advertising.