WHAT'S IN A NAME?
The 12 month calendar which currently serves as the world standard of time is called the Gregorian Calendar, named for Pope Gregory XIIIth who "revised" the previous Julian calendar (named for Julius Caesar). October 5, 1582 was followed by October 16th, 1582, correcting for the Julian calendar which had slipped behind the Spring Equinox by 10 days. Aside from an improved leap year calculation, Pope Gregory's calendar has no structural differences from Caesar's calendar.
The Julian calendar, (instituted in 46-45 B.C.) was preceded by the calendar of the Roman Empire, which was actually a calendar of only 10 months. On the original Roman count, September (which literally means 7) was the 7th month, October (which means 8 - like octagon) was the 8th month, November (9) was the ninth, and December (10) was the tenth and last month.
When Julius Caesar came to power he inserted the 31-day month of July (named for Julius) and later his son Augustus Caesar placed his name in the calendar - the 31-day month of August, throwing the names of the rest of the month's askew!
The names of the months are as illogical as their uneven numbering. January is derived from the God of the doorway; February is an obscure word referring to a divinatory rite using animal entrails; Mars refers to the planet and god of war; April and May refer to goddesses of the spring; June to the wife of Jupiter.
The word "calendar" itself is derived from a the Latin word meaning "account book," the first day of every month being "calends" or the date of payment of debts. This confirms the depths of the societal programming that "time is money."