Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
142,127 days
From Tuesday, July 21, 1637 to Monday, September 7, 2026.
Monday–Friday weekdays101,519
Weeks and days20,303w 6d
Calendar span389 years, 1 month, 17 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.