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Comparison of Roman and Gregorian Calendar Months
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Roman |
|
Gregorian |
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|
Romulus |
Numa |
Caesar |
Augustus |
Gregorian |
|
Ianuarius |
— |
29 |
31 |
31 |
31 |
January |
Februarius |
— |
28 |
29/30 |
28/29 |
28/29 |
February |
Mercedonius |
— |
22/23 |
— |
— |
— |
— |
Martius |
31 |
31 |
30 |
31 |
31 |
March |
Aprilis |
30 |
29 |
30 |
30 |
30 |
April |
Maius |
31 |
31 |
31 |
31 |
31 |
May |
Iunius |
30 |
29 |
30 |
31 |
30 |
June |
Quintilis(Iulius) |
31 |
31 |
31 |
31 |
31 |
July |
Sextilis (Augustus) |
30 |
29 |
30 |
31 |
31 |
August |
September |
30 |
29 |
31 |
30 |
30 |
September |
October |
31 |
31 |
30 |
31 |
31 |
October |
November |
30 |
29 |
31 |
30 |
30 |
November |
December |
30 |
29 |
30 |
31 |
31 |
December |
Total Days |
304 |
355/77/78 |
365/66 |
365/66 |
365/66 |
|
The number of days allocated to the months by Caesar is disputed. They may have been the same as ascribed to Augustus above. |
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Adapted from Mapping Time: The Calendar and its History, E. G. Richards, Table 16.1, pg. 212 |
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