Related terms:
ides
bis
leap day
kalendar
kalender
leap year
calendario
julian year
divisible
intercalary month
vernal equinox
greek orthodox church
adopted the gregorian calendar
julian calendar
gregorian calendar
russian orthodox church
orthodox church
eastern orthodox church
calendar
Wikipedia sources:
Leap year
Julian calendar
Gregorian calendar
Eastern Orthodox Church
Context for words:
revised
julian
calendar
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