Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
142,980 days
From Wednesday, March 21, 1635 to Monday, September 7, 2026.
Monday–Friday weekdays102,128
Weeks and days20,425w 5d
Calendar span391 years, 5 months, 17 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.