Calendar days
Standard mode excludes the earlier date and includes the later date. Inclusive mode counts both endpoints.
Days between dates
Count the exact distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
280,484 days
From Thursday, October 10, 1258 to Friday, September 18, 2026.
Monday–Friday weekdays200,346
Weeks and days40,069w 1d
Calendar span767 years, 11 months, 8 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.
Counting rules
How the date difference is calculated
Weekdays
Monday through Friday are counted separately. For holiday-aware deadlines, use the business days calculator.
Related calculations
Start with today’s date, calculate an exact age, or add time to a date.