Related terms:
bis
ides
month
kalender
days
kalendar
julian
easter
leap year
calendario
divisible
leap years
full moon
julian year
calendar
alexandrian
solar calendar
lunar calendar
vernal equinox
julian calendar
intercalary month
islamic calendar
february
gregorian calendar
revised julian calendar
orthodox church
adopted the gregorian calendar
Wikipedia sources:
Computus
Leap year
Gregorian calendar
February 29
Julian calendar
February 30
Iranian calendar
French Republican Calendar
Context for words:
leap
day
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