Assertion: leap year | /r/CapableOf | add extra day
Facets:
Source sentences:
text: Calendars repeat in a regular cycle, at least within a century, because each year has 1 day more than exactly 52 weeks, and leap years add another extra day .
text: To accommodate the extra 0.242375 days each year, every four years we have a "leap year" that includes an extra day.