Date & Time Tools

Dates and times are one of the most error-prone areas in everyday computing. Leap years, uneven month lengths, time zones, and epoch offsets all conspire to make manual arithmetic unreliable, and an off-by-one error in a deadline or a schedule can have real consequences. These tools apply the correct rules for you so the answer is right the first time.

The collection is equally useful for planning and for debugging. On the planning side, you can count the exact time between two dates, work out business days while excluding weekends, add or subtract days, and run a live countdown to an event. On the technical side, the Unix timestamp converter decodes and encodes epoch values that turn up constantly in logs and APIs.

Everything is computed locally in your browser, so the dates you enter — which can themselves be sensitive, like a birth date or a contract deadline — are never sent anywhere.