Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
140,967 days
From Sunday, September 23, 1640 to Monday, September 7, 2026.
Monday–Friday weekdays100,691
Weeks and days20,138w 1d
Calendar span385 years, 11 months, 15 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.