Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
142,718 days
From Saturday, December 8, 1635 to Monday, September 7, 2026.
Monday–Friday weekdays101,941
Weeks and days20,388w 2d
Calendar span390 years, 8 months, 30 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.