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.

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

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

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

Stopwatch Timer Countdown to Any Date Eclipse Countdown Summer Countdown New Year Countdown Countdown for Your Site Calculators Date to Date Calculator (duration) Business Date to

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

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

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