- Photo: Roman mosaic with the months of the year, starting with March, the first month of the Roman calendar - from El Djem, Tunisia, first half of third century AD. Archeological Museum of Sousse, Tunisia. Source: Ad Meskens, 2012, CC BY-SA 3.0.
- The Roman Calendar at the Encyclopædia Britannica. Retrieved on January 2, 2018.
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