Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
142,831 days
From Friday, August 17, 1635 to Monday, September 7, 2026.
Monday–Friday weekdays102,021
Weeks and days20,404w 3d
Calendar span391 years, 21 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.