Assertion: leap year's month | /r/MadeOf | 29 or 30 days
Facets:
Source sentences:
text: The observed and calculated versions of the Islamic calendar do not have regular leap days, even though both have lunar months containing 29 or 30 days, generally in alternating order.
text: The observed and calculated versions of the Islamic calendar do not have regular leap days, even though both have lunar months containing 29 or 30 days, generally in alternating order.