FREE DATE & TIME TOOLS
Date Calculator
Find the number of days between two dates, count weekdays, or add and subtract days. Results are calculated on your device without sending your dates to a server.
Weekdays exclude Saturday and Sunday. Public holidays are not excluded. Date calculations use calendar dates rather than time-of-day offsets.
How to use this date calculator
Enter a start and end date to find the number of calendar days between them. For working-day estimates, select “Count weekdays only”. You can also choose the second mode to add or subtract calendar or working days from a chosen date.
Calendar days vs. business days
Calendar days include all weekdays and weekends. Business days in this calculator include Monday to Friday but do not account for national holidays or a company's individual schedule. Select the inclusive option only when you want to count both endpoint dates.
Frequently asked questions
Does the calculator include the starting date?
By default, the difference between two dates excludes the starting date. Select the inclusive option to count both dates.
Does daylight saving time affect the result?
No. The calculator works with calendar dates instead of elapsed milliseconds, so a day remains one calendar day even where clocks change.
Can I subtract days?
Yes. Select “Add or subtract days” and enter a negative number, such as -14.
Related tools: Calendar, Week numbers, Countdown, and Time converter.