Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
155,491 days
From Monday, December 18, 1600 to Monday, September 7, 2026.
Monday–Friday weekdays111,065
Weeks and days22,213w 0d
Calendar span425 years, 8 months, 20 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.