Calendar, Roman Style Evolution
(Development of the Roman Calendar Through the Centuries)
Roman Calendars — in Transition
The dates displayed on this page show the transitions of the earliest Roman calendars to the last revised version.
Roman calendars from
Romulus (738 B.C.) to
Pope Gregory XIII (A.D. 1582)
| Romulus | Numa | Council of
Decemvirs |
Julius | Augustus | Gregory XIII |
|---|---|---|---|---|---|
| Circa
738 B.C. |
713 B.C. | 451 B.C. | 47 B.C. | 8 B.C. | Europe
A.D. 1582 England A.D. 1752 |
| Months
# Days |
Months
# Days |
Months
# Days |
Months
# Days |
Months
# Days |
Months
# Days |
| Martius
31 |
Januarius
29 |
Januarius
29 |
Januarius
31 |
Januarius
31 |
January
31 |
| Aprilis
30 |
Martius
31 |
Februarius
28 |
Februarius
29/30 |
Februarius
28/29 |
February
28/29 |
| Maius
31 |
Aprilis
29 |
Martius
31 |
Martius
31 |
Martius
31 |
March
31 |
| Junius
30 |
Maius
31 |
Aprilis
29 |
Aprilis
30 |
Aprilis
30 |
April
30 |
| Quintilis
31 |
Junius
29 |
Maius
31 |
Maius
31 |
Maius
31 |
May
31 |
| Sextilis
30 |
Quintilis
31 |
Junius
29 |
Junius
30 |
Junius
30 |
June
30 |
| Septemris
31 |
Sextilis
29 |
Quintilis
31 |
Julius
31 |
Julius
31 |
July
31 |
| Octobris
30 |
Septembris
29 |
Sextilis
29 |
Sextilis
30 |
Augustus
31 |
August
31 |
| Novembris
31 |
Octobris
31 |
Septembris
29 |
Septembris
31 |
Septembris
30 |
September
30 |
| Decembris
29 |
Novembris
29 |
Octobris
31 |
Octobris
31 |
Octobris
31 |
October
31 |
| Decembris
29 |
Novembris
29 |
Novembris
31 |
Novembris
30 |
November
30 |
|
| Februarius
28 |
Decembris
29 |
Decembris
30 |
Decembris
31 |
December
31 |
|
| 304
days |
355
days |
355
days |
365.25
days |
365.25
days |
365.2422
days |
Procrastination is the thief of time.
Television does a pretty good job, too.
Permanence is a man-made fantasy smiled on by time.
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