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Timer online with alarm. Create one or multiple timers and start them in any order.

Online stopwatch. Easy to use and accurate stopwatch with lap times and alarms. Optional split intervals and alarm sound.

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.

Calendars – online and print friendly – for any year and month and including public holidays and observances for countries worldwide.

The Date Calculator adds or subtracts days, weeks, months and years from a given date.

Welcome to the world's top site for time, time zones, and astronomy. Organize your life with free online info and tools you can rely on. No sign-up needed.

Business Days Calculator counts the number of days between two dates, with the option of excluding weekends and public holidays.

Find the exact time difference with the Time Zone Converter – Time Difference Calculator which converts the time difference between places and time zones all over the world.

Calendars – online and print friendly – for any year and month and including public holidays and observances for countries worldwide.

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