Pentecontad calendar
Sign in to saveMesopotamian calendar, whose year consists of 7 periods of 50 days, with an annual supplement of 15 or 16 days
Available in 7 languages
via Wikidata sitelinks · CC0
Mesopotamian calendar, whose year consists of 7 periods of 50 days, with an annual supplement of 15 or 16 days
via Wikidata sitelinks · CC0