Assertion: moon's day | /r/HasProperty | 28 or 29 days
Facets:
Source sentences:
text: Black Moon : In contrast to the Blue Moon, Black Moon has been used to refer to a month in which there is no full Moon; this can only occur in February, because the calendar month has fewer days (28 or 29 days) than the lunar month (about 29.5 days).
text: : In contrast to the Blue Moon, Black Moon has been used to refer to a month in which there is no full Moon; this can only occur in February, because the calendar month has fewer days (28 or 29 days) than the lunar month (about 29.5 days).