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.
285,591 days
From Monday, October 17, 1244 to Saturday, September 19, 2026.
Monday–Friday weekdays203,994
Weeks and days40,798w 5d
Calendar span781 years, 11 months, 2 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.