Date & Time

Date, time, timezone, countdown, and duration calculators.

Ready to use

Convert timestamps into readable dates and back.

Calculate the number of days between two dates.

Find the difference between dates in years, months, weeks, and days.

Calculate working days between dates excluding weekends.

Add or subtract days, weeks, months, or years from a date.

Convert dates between common formats.

Estimate a pregnancy due date from a start date or conception date.

Convert times between different time zones.

Convert Unix timestamps in seconds or milliseconds.

Calculate age from a date of birth.

Calculate exact age in years, months, days, hours, and minutes.

Check whether a year is a leap year.

Calculate duration between two times.

Calculate how long until the next birthday.

Create a browser-based countdown timer.

Use a simple focus and break timer.

Track elapsed time in the browser.