Roman Inventions that Changed the World.
History Behind the Calendar
The original Roman calendar is said to have been the copy of a Greek lunar calendar. As the time between new moons averages 29.5 days. There were two different months hollow months 29 days or full months which is 30 days. Hollow months were considered unlucky full moths were considered powerful and auspicious. Unlike modern calendars Romans counted backwards from three fixed points. Nones the Ides and the Kalends.
Calendar of Romulus and Numa
Roman writers attributed the original Roman calendar to Romulus the mythical founder of rome around 753 BC. The Romulus calendar had ten months with the spring equinox in the first month. Numa Pompilius the second of the seven traditional kings of rome reformed the calendar of Romulus around 713 BC. The Roman considered odd numbers to be lucky. So Numa took one day from each of the six months with 30 days reducing the number of days in the 10 previously defined months by a total of six days.
Pictures of the Calendars
The roman calendar
Calendar of Numa
A picture of how Numa changed the calendar
This is a picture of the present day calendar
More about the Calendar
The regular calendar years consisted of 304 days. With the winter days after December and before the beginning of the following march not being assigned to any month. Sense odd numbers were supposedly lucky the romans thought even numbers were unlucky. They eventually altered their calendar to ensure that each month had an odd number of days and of course they did the same we do today with the calendar to tell what day it is.
I put this video here to because i wanted it to explain how the Roman calendar was created and how it works.
Teach Astronomy - Early Roman Calendar
time and date.com