12 months of 30 days plus a 13th month · All Facts

12 months of 30 days plus a 13th month
Ethiopia's official Ge'ez calendar has 12 months of 30 days plus a 13th month of five or six epagomenal days.
SrcEmbassy of Ethiopia (Washington, D.C.)

Next evidence →55 languagesEach Voyager Golden Record carries greetings in 55 languages, natural sounds, music, and a printed message from President Carter — selected for NASA by a Carl Sagan–led committee.

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