Online Stopwatch, with start alerts, lap times and sounds. Save details of your timings in a text file.

Online Timer with Alarm Create your timers with optional alarms and start/pause/stop them simultaneously or sequentially. They are perfect for everyday activities such as cooking m

Create a Countdown Timer that counts down in seconds, minutes, hours and days to any date, with time zone support. It also counts up from a past date.

Tools Years with Same Calendar as 2026 Customization Forms Customize this calendar–large – advanced form with more choices Customize this calendar – classic, basic form Chang

Date Calculator: Add to or Subtract From a Date Enter a start date and add or subtract any number of days, months, or years.

The Duration Calculator calculates the number of days, months and years between two dates.

Online Stopwatch Time your activities. With start alerts, lap times, and alarm sound.

Calculate local times for sunrises, sunsets, meridian passing, Sun distance, altitude and twilight, dusk and dawn times.

Interactive night sky map for any location. Which planets, stars, constellations, and comets are visible tonight?

Accuracy of the Time Zone Map All clock changes worldwide are automatically taken into account and displayed in real-time as soon as you reload the page. Future changes are usually