Assertion: leap year's day | /r/HasProperty | additional
Facets:
Source sentences:
text: A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) added to keep the calendar year synchronized with the astronomical year or seasonal year.
text: A leap year is a year containing one additional day in order to keep the calendar year synchronized with the astronomical or seasonal year.
text: A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) added to keep the calendar year synchronized with the astronomical year or seasonal year.