Dates and Calendrics

A Roman year has 12 months. Each month has a kalendae (kal.), a nonae (non.) and a idus (id.). The months are as follows:

Martius....31 days...Kal. 1st...Non. 7th...Id. 15th

Aprilis....29 days....Kal. 1st...Non. 5th....Id. 13th

Maius....31 days....Kal. 1st....Non. 7th....Id. 15th

Iunius....29 days...Kal 1st....Non. 5th....Id. 13th

Quintilis....31 days...Kal 1st...Non. 7th....Id. 15th

Sextilis....29 days....Kal 1st....Non 5th...Id 13th

September....29 days...Kal. 1st....Non. 5th....Id. 13th

October....31 days....Kal 1st...Non. 7th....Id. 15th

November...29 days....Kal 1st....Non 5th....Id 13th

December...29 days....Kal 1st...Non. 5th....Id 13th

Ianuarius....29 days...Kal. 1st...Non. 5th...Id 13th

Februarius...28 days....Kal 1st...Non. 5th....Id. 13

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Some important dates are:

Kal. Mar. Matronalia.

p.d. I Id. Mar. Equirria Secunda.

Id. Mar. Bacchanalia.