Free days-left and date calculator
Use this date calculator to find how many days are left until a deadline, birthday, holiday, trip, or other event. You can also count the days between two dates or calculate a future or past date using calendar days or weekdays. The tool runs in your browser without an account.
Three ways to calculate dates
- How many days left? Choose a date to see the number of complete calendar days from today. The result updates each day.
- Days between dates: Compare two dates in either order to get their calendar-day difference.
- Add or subtract days: Move forward or backward from a date using calendar days or weekdays. Weekday calculations skip Saturday and Sunday, but do not account for public holidays.
How does the days-left countdown count?
The calculator counts complete calendar days between your local today and the selected date. Today is day zero: for example, if an event is tomorrow, the result is one day left. A date in the past is shown as days ago. Time of day is not considered.
Date calculator questions
How many days are left in the year?
Choose “Days left this year” in the countdown calculator. It counts complete calendar days until December 31, with today treated as day zero.
Does the business day calculator include holidays?
No. It excludes Saturdays and Sundays only. Holiday calendars vary by location and organization, so verify important deadlines with the relevant authority.
Are my dates uploaded or saved?
No. Date calculations happen in your browser. The calculator does not send your dates to a server or save them.