Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
171,932 days
From Thursday, December 15, 1555 to Tuesday, September 8, 2026.
Monday–Friday weekdays122,808
Weeks and days24,561w 5d
Calendar span470 years, 8 months, 24 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.