Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
243,584 days
From Monday, October 15, 1359 to Saturday, September 12, 2026.
Monday–Friday weekdays173,989
Weeks and days34,797w 5d
Calendar span666 years, 10 months, 28 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.