How to calculate days between two dates
Calculate the difference between dates in calendar days and distinguish elapsed days from inclusive counting. For working days, choose which weekdays you actually work and enter any dates to exclude. You can also add or subtract calendar or working days from a date. All calculations use timezone-independent UTC calendar arithmetic. Public holidays are not added automatically: enter those that apply to you. This tool is not designed for legal deadlines.
Example: from November 1 to November 11, 10 days pass; counting both dates gives 11 days.
Results are estimates and depend on the supplied values.
Practical guide to counting days and dates
Calendar days: elapsed or inclusive
The usual difference measures elapsed time: from the 1st to the 8th is 7 days. If you need both endpoints included, such as counting nights or days of attendance, enable inclusive counting.
From the 1st to the 8th: 7 days · Including both: 8 days
Working days based on your schedule
Not everyone works Monday to Friday. Choose your usual working weekdays and add the holidays that apply. A holiday that already falls on a day off is never subtracted twice.
Working days = counted dates − days off − holidays on working days
Adding and subtracting days
Select the second mode to find a date a certain number of days in the future or past. Adding 3 calendar days to Monday gives Thursday. Adding 3 working days on a Monday–Friday schedule also gives Thursday unless you add a holiday.
Target date = starting date ± chosen number of days
Why add holidays yourself?
Public holidays depend on country, region, municipality and employer. Rather than assume the wrong calendar, this tool lets you enter your own dates. Always confirm official deadline rules where relevant.
Entered holidays affect only working-day counts.
Frequently asked questions
How many days are there between two dates?
Choose a start and end date to see elapsed calendar days and their equivalent in full weeks and days.
Is the starting day included?
Not by default: one day elapses between Monday and Tuesday. Enable inclusive counting to include both endpoints.
Can I count Saturdays as working days?
Yes. Tick Saturday in your normal working-week selection, or customize any other combination of weekdays.
Does it automatically account for public holidays?
No. Add the holidays and days off that apply to you to avoid misleading results for different places and years.
Can I use it to calculate official filing deadlines?
This is a general calendar tool. It does not implement special rules for official notices, filing periods or local public holidays. Check the applicable official rules.
What about leap years and daylight saving time?
Leap days are counted correctly. Dates are processed using UTC calendar days to avoid errors caused by clock changes.