Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
140,519 days
From Sunday, December 15, 1641 to Monday, September 7, 2026.
Monday–Friday weekdays100,371
Weeks and days20,074w 1d
Calendar span384 years, 8 months, 23 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.