Borana calendar

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The Borana calendar consist of 29.5 days and 12 months for a total 354 days in a year. It has no weeks. It is a lunar and stellar calendar.[1]

It is believed that the Borana of developed their own calendar around 300 BC. The Borana calendar is a lunar-stellar calendrical system, relying on astronomical observations of the moon in conjunction with seven particular stars or constellations. Borana Months (Stars/Lunar Phases) are Bittottessa (Triangulum), Camsa (Pleiades), Bufa (Aldebaran), Waxabajjii (Belletrix), Obora Gudda (Central Orion-Saiph), Obora Dikka (Sirius), Birra (full moon), Cikawa (gibbous moon), Sadasaa (quarter moon), Abrasa (large crescent), Ammaji (medium crescent), and Gurrandala (small crescent).[1]

Days

  1. Bita Kara
  2. Gardaduma
  3. Bita Lama
  4. Sonsa
  5. Sorsa
  6. Rurruma
  7. Algajima
  8. Lumasa
  9. Arb
  10. Gidada
  11. Walla
  12. Ruda
  13. Basa Dura
  14. Areri Dura
  15. Basa Ballo
  16. Areri Ballo
  17. Carra
  18. Adula Dura
  19. Maganatti Jarra
  20. Adula Ballo
  21. Maganatti Britti
  22. Garba Dura
  23. Salban Dura
  24. Garba Balla
  25. Salban Balla
  26. Garda Dullacha
  27. Salban Dullacha

(first two or three days are repeated during the months)

Months can be identified by moon phase in relation to seven stars or star groups. They are Triangulum, Pleiades, Aldebaran, Bellatrix, central Orion, Saiph, and Sirius star systems.

Months and Star System

  1. Bittottessa-Triangulum
  2. Camsa-Pleiades
  3. Bufa-Aldebaran
  4. Wacabajjii-Belletrix
  5. Obora Gudda-Central Orion-Saiph
  6. Obora Dikka-Sirius
  7. Birra-full moon
  8. Cikawa-gibbous moon
  9. Sadasaa-quarter moon
  10. Abrasa-large crescent
  11. Ammaji-medium crescent
  12. Gurrandala-small crescent

References[edit]

  1. ^ a b Doyle, Laurance R. The Borana Calendar REINTERPRETED. Current Anthropology. Physics and Astronomy Department, University of California, Santa Cruz, at NASA Ames Research Center, Space Sciences Division, M.S., retrieved: 7 April 2010.