Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
243,626 days
From Monday, September 3, 1359 to Saturday, September 12, 2026.
Monday–Friday weekdays174,019
Weeks and days34,803w 5d
Calendar span667 years, 9 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.