Calendar Days was created on 2003-02-08.
Calendar days are every day on the calendar, including weekend days, weekdays, business days and holidays. So, for example, 10 calendar days after the 4th of a month is the 14th of the same month.
Sosigenes created the calendar to follow the equinoxes. He used the Julian Calendar that was created by Julius Caesar in 46 B.C. To do this he calculated that 23 days be added after February 23rd, two months be added between the end of November and the beginning of December. Thus, adding 67 days to the "then" calendar.
The Advent calendar has special meaning during the holiday season. Created in the 19th century by Lutheran Germans, the calendar counts down the days until Christmas, typically in December.
December has 31 days in the Gregorian calendar, as that is the calendar that we now use.
The Newgate Calendar was created in 1774.
Positivist calendar was created in 1849.
Kingfisher Calendar was created in 2003.
Country Calendar was created in 1966.
Lemarean Calendar was created in 2002.
Calendar Man was created in 1958.
Fasli Calendar was created in 1650.
The Calendar of Nature was created in 1821.