Assertion: calendar's month | /r/HasProperty | 29 days
Facets:
value: in length
type: OTHER
value: previously
type: TEMPORAL
Source sentences:
text: The calendar consists of 12 months, the first six of which are 31 days, the next five 30 days, and the final month 29 days in a normal year and 30 days in a leap year.
text: This was probably because all months had previously been 30 days for such a long period of time.
text: The months were 29 or 30 days in length, loosely in alternation, since the moon orbits the earth in roughly 29.5 days.