Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
149,405 days
From Thursday, August 17, 1617 to Monday, September 7, 2026.
Monday–Friday weekdays106,717
Weeks and days21,343w 4d
Calendar span409 years, 21 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.