Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
220,886 days
From Tuesday, December 4, 1421 to Wednesday, September 9, 2026.
Monday–Friday weekdays157,776
Weeks and days31,555w 1d
Calendar span604 years, 9 months, 5 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.