Days between dates
Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.
161,826 days
From Monday, August 15, 1583 to Monday, September 7, 2026.
Monday–Friday weekdays115,590
Weeks and days23,118w 0d
Calendar span443 years, 23 days
Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.