Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
155,555 days
From Sunday, October 15, 1600 to Monday, September 7, 2026.
Monday–Friday weekdays111,111
Weeks and days22,222w 1d
Calendar span425 years, 10 months, 23 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.