The Roman Calendar

The Roman Calendar

The Roman calendar is a fascinating topic! It has evolved significantly over time, reflecting the changes in Roman society and their understanding of astronomy. Here's a detailed overview:

Early Roman Calendar
The earliest Roman calendar, attributed to Romulus, the founder of Rome, was a lunar calendar with 10 months and a total of 304 days. The months were:

Martius (31 days)
Aprilis (30 days)
Maius (31 days)
Junius (30 days)
Quintilis (31 days)
Sextilis (30 days)
September (30 days)
October (31 days)
November (30 days)
December (30 days)
 
Numa Pompilius' Reforms
 Numa Pompilius, the second king of Rome, reformed the calendar around 713 BCE. He added two months, Januarius and Februarius, to align the calendar more closely with the lunar year. The revised calendar had 355 days:
 
Januarius (29 days)
Februarius (28 days)
Martius (31 days)
Aprilis (30 days)
Maius (31 days)
Junius (30 days)
Quintilis (31 days)
Sextilis (30 days)
September (30 days)
October (31 days)
November (30 days)
December (30 days)
 
Intercalation
 To keep the calendar in sync with the solar year, the Romans used a system of intercalation, adding an extra month called Mercedonius or Intercalaris. This month was inserted after Februarius every two or three years, but the system was often manipulated for political purposes, leading to confusion.
 
Julian Calendar
 Julius Caesar reformed the Roman calendar in 46 BCE, creating the Julian calendar. He introduced a solar calendar with 365 days and a leap year every four years. The months were:
 
Januarius (31 days)
Februarius (28/29 days)
Martius (31 days)
Aprilis (30 days)
Maius (31 days)
Junius (30 days)
Quintilis (31 days) - later renamed Julius in honor of Julius Caesar
Sextilis (31 days) - later renamed Augustus in honor of Emperor Augustus
September (30 days)
October (31 days)
November (30 days)
December (31 days)
 
Gregorian Calendar
 The Julian calendar was used until the introduction of the Gregorian calendar in 1582 by Pope Gregory XIII. The Gregorian calendar corrected the inaccuracies of the Julian calendar by adjusting the leap year rule and realigning the calendar with the solar year.
 
Conclusion
 The Roman calendar's evolution reflects the Romans' efforts to create a more accurate and practical system for measuring time. From its early lunar roots to the solar-based Julian calendar, the Roman calendar has had a lasting impact on the way we measure time today.
 
The Roman Calendar: Origins & Festivals
Get this book UK at https://amzn.to/4afO7ip
Get the book USA at https://amzn.to/49Xn7nA
This book explores the origins of our calendar which dates back to the days of ancient Rome. The festivals and various celebrations are described, from the wild excesses of the Lupercalia to the gentler pastoral Floralia and Ambarvalia, the Roman zest for life shines through their year. The whole of the Roman world can be found in the chronology of time. How they related to their God's and Goddesses, their mythology, their sports, harvests, work and play. Now is the time to decode this enigma and see how the Romans really lived, so turn back the clock, step back in time, its all in our calendar!
 
Follow Roman History on X @romanhistory1 or https://x.com/romanhistory1