Assertion: leap year's day | /r/HasProperty | every four years
Facets:
Source sentences:
text: An extra 23 hours, 15 minutes, and 4 seconds thus accumulates every four years (again, for simplicity's sake, approximately an extra 24 hours, or 1 day, every four years), requiring that an extra calendar day be added to align the calendar with the Sun's apparent position.
text: An extra 23 hours, 15 minutes, and 4 seconds thus accumulates every four years (again, for simplicity's sake, approximately an extra 24 hours, or 1 day, every four years), requiring that an extra calendar day be added to align the calendar with the Sun's apparent position.
text: Generally, it is a leap year, with one extra day, every four years.
text: To make up for the extra six hours it actually takes to go around the sun one time, the Gregorian calendar started adding an extra day (almost) every four years.
text: To allow for the fact that the year is actually a little longer than that, we add an extra day - "leap day" - every four years, in year numbers that are divisible by four.