The Roman calendar was the calendar used by the Roman Kingdom and Roman Republic. Although the term is primarily used for Rome's pre-Julian calendars, it...

General Roman Calendar is the liturgical calendar that indicates the dates of celebrations of saints and mysteries of the Lord (Jesus Christ) in the Roman Rite...

over the long term. The term calendar is taken from kalendae, the term for the first day of the month in the Roman calendar, related to the verb calare...

Berbers). The Julian calendar was proposed in 46 BC by (and takes its name from) Julius Caesar, as a reform of the earlier Roman calendar, which was largely...

The Gregorian calendar is the calendar used in most parts of the world. It went into effect in October 1582 following the papal bull Inter gravissimas...

are still the basis of many calendars today and are used to divide the year. Calendars that developed from the Roman calendar system, such as the internationally...

A calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one. For example, it is the year 2024 as...

"nine") or mensis November was originally the ninth of ten months on the Roman calendar, following October (octo, "eight") and preceding December (decem, "ten")...

Coligny calendar. Nevertheless, the Roman calendar contained very ancient remnants of a pre-Etruscan 10-month solar year. The Roman calendar was reformed...

March (see General Roman Calendar). Both days can thus be said to be their feast day, in different traditions. The General Roman Calendar, which list those...