Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
142,981 days
From Tuesday, March 20, 1635 to Monday, September 7, 2026.
Monday–Friday weekdays102,129
Weeks and days20,425w 6d
Calendar span391 years, 5 months, 18 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.