Date & Time Tools

Calculate exact age in years, months, and days between two dates.

Convert between Unix timestamps and human-readable dates, with a live clock showing the current timestamp.

Calculate the exact difference between two dates in days, weeks, months, and years.

Enter a future date and see a live countdown in days, hours, minutes, and seconds.

Calculate the number of business days between two dates, excluding weekends and optional holidays.

Add or subtract a number of days from a date to find the resulting date.

Find the ISO week number, day of year, and quarter for any date.

Check whether a year is a leap year and see nearby leap years.

Convert a time from one timezone to another using the Intl API.

Set a countdown timer with hours, minutes, and seconds, and get a beep when it finishes.

Convert between Unix timestamps and human-readable dates in both directions.