Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
146,003 days
From Thursday, December 10, 1626 to Monday, September 7, 2026.
Monday–Friday weekdays104,287
Weeks and days20,857w 4d
Calendar span399 years, 8 months, 28 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.