Coligny calendar

The Coligny calendar is a peg calendar (or parapegma) made in Roman Gaul in ca. the 2nd century AD, giving a five-year cycle of a lunisolar calendar with intercalary months. It is the most important evidence for the reconstruction of an ancient Celtic calendar. It is written in Latin inscriptional capitals and is in the Gaulish language. The restored tablet contains sixteen vertical columns, with 62 months distributed over five years.

• http://en.wikipedia.org/wiki/Coligny calendar
• Page 34 - Jones, T., 2007, Barbarians: An Alternative Roman History: BBC Books, 320p.