Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
243,534 days
From Tuesday, December 4, 1359 to Saturday, September 12, 2026.
Monday–Friday weekdays173,953
Weeks and days34,790w 4d
Calendar span666 years, 9 months, 8 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.