Ethiopian calendar of thirteen months (Bahire Hasab)
Calendario etíope de trece meses (Bahire Hasab)
- Date
- c. siglos IV-X · confidence low
- Place
- Kingdom of Aksum, Tigray, Ethiopia
- Credited to
- Ethiopian Orthodox Church
- Field
- Knowledge & symbols
⚠️ Disputed: the sources disagree.
What it is
A calendar of twelve 30-day months plus a thirteenth of five or six days, inherited from Alexandrian reckoning but with its own Easter computus. It remains in civil and religious use and runs seven or eight years behind the Gregorian.
An adaptation of the Coptic-Alexandrian calendar; the 7-8 year gap comes from a different reckoning of the date of the Incarnation. The date of adoption is undocumented and is assumed to fall in Aksum's Christian period or later.
What it led to
- Ethiopia's liturgical and civil calendar to this day
- own computus for the movable feasts (Bahire Hasab)
- an alternative chronology that still dates New Year (Enkutatash)