Date Difference
Count the days between two dates with clear start and end rules.
Open toolDate & Time Tools
Calculate dates, durations, and time across cities. Free to use, with no account needed.
Add or Subtract Dates
Move a date forward or backward by days, weeks or calendar months.
Open toolDate Countdown
See how many days remain until a date, or how many have passed.
Open toolBusiness Days
Exclude weekends and dates you explicitly enter.
Open toolWorld Time
Compare the same moment across cities and time zones.
Open toolTime Converter & Sum
Convert hours, minutes and seconds, or add a list of durations.
Open toolOfficial public holidays are not applied automatically. You can enter dates to exclude manually. Time zones use the IANA data supplied by your browser.