Date-to-date calculator

Days between dates

Count the distance between two Gregorian calendar dates. Weekdays mean Monday through Friday and do not exclude holidays.

Excluding the start date

187,634 days

From Wednesday, December 18, 1512 to Tuesday, September 8, 2026.

Monday–Friday weekdays134,024
Weeks and days26,804w 6d
Calendar span513 years, 8 months, 21 days

Standard mode excludes the earlier endpoint and includes the later endpoint. Reversed inputs keep the same absolute counts and are identified above.