The Roman Calendar The Roman Calendar The Julian Calendar: developed by Julius Caesar The Julian Calendar: developed by Julius Caesar 12 Months (given in Acc. Pl.): 12 Months (given in Acc. Pl.): Ianuarias Apriles Iulias Octobres Ianuarias Apriles Iulias Octobres Februarias Maias Augustos Novembres Februarias Maias Augustos Novembres Martias Iunias Septembres Decembres Martias Iunias Septembres Decembres Each month has: Each month has: KALENDAS - 1st of every month KALENDAS - 1st of every month NONAS - 5th (or 7th) NONAS - 5th (or 7th) IDŪS - 13th (or 15th) IDŪS - 13th (or 15th) *N.B. The months March, May, July, October use the 7th and 15th *N.B. The months March, May, July, October use the 7th and 15th Dates Dates To refer to a Kalends, Nones, or Ides, the date is ABLATIVE TIME WHEN: To refer to a Kalends, Nones, or Ides, the date is ABLATIVE TIME WHEN: ie. March 15th - Idibus Martiis ie. March 15th - Idibus Martiis December 1st - Kalendis Decembribus December 1st - Kalendis Decembribus To refer to the DAY BEFORE the Kal., Non., or Id., use the preposition To refer to the DAY BEFORE the Kal., Non., or Id., use the preposition PRIDIE: PRIDIE: ie. April 12th - pridie Idus Apriles ie. April 12th - pridie Idus Apriles August 4th - pridie Nonas Augustas August 4th - pridie Nonas Augustas To refer to ANY OTHER DATE, count backwards from the next Kal., Non., or To refer to ANY OTHER DATE, count backwards from the next Kal., Non., or Id. Use the preposition ANTE DIEM: Id. Use the preposition ANTE DIEM: ie. January 9th - ante diem V Idus Ianuarias ie. January 9th - ante diem V Idus Ianuarias November 29th - ante diem III Kalendas Decembres November 29th - ante diem III Kalendas Decembres May 2nd - ante diem VI Nonas Maias May 2nd - ante diem VI Nonas Maias *N.B. ALWAYS include the STARTING point and ENDING point *N.B. ALWAYS include the STARTING point and ENDING point Years Years 1. in reference the CONSULSHIP in an ABLATIVE ABSOLUTE 1. in reference the CONSULSHIP in an ABLATIVE ABSOLUTE ie. Pompeio Crasso consulibus - 70BC ie. Pompeio Crasso consulibus - 70BC 2. count from the FOUNDING of the city (Ab Urbe Condita) in 753BC 2. count from the FOUNDING of the city (Ab Urbe Condita) in 753BC ie. 509BC - CCXLV A.U.C. ie. 509BC - CCXLV A.U.C. 27BC - DCCXXVII A.U.C 27BC - DCCXXVII A.U.C 13AD - DCCLXVII A.U.C. 13AD - DCCLXVII A.U.C. *N.B. ALWAYS include the STARTING point and ENDING point *N.B. ALWAYS include the STARTING point and ENDING point .