Well look on a calendar and look at the last day...
December has 31 days in the Gregorian calendar, as that is the calendar that we now use.
There are 365 days.how many their are in a regular calendar
There are 366 or 265 days in a sami calendar or year
365 days
365
The Julian calendar is 13 days behind the Gregorian calendar from March 1900 until March 2100.
33 calendar days.
7 days
In the Gregorian Calendar, which is the calendar currently used in every American country, 75.75% of the years have 365 days each, and 24.25% of the years have 366 days each, making the average calendar year 365.2425 days.
Philippines has 27 days included on an advent calendar.
Due to its dependance on the lunar movements, the Hijra calendar year is a shorter than the Gregorian calendar by about ten days which means that there are usually 355 days in a Hijra calendar.
365