Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
140,893 days
From Thursday, December 6, 1640 to Monday, September 7, 2026.
Monday–Friday weekdays100,637
Weeks and days20,127w 4d
Calendar span385 years, 9 months, 1 day
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.