Assertion: year | /r/HasProperty | leap years
Facets:
value: according to these rules
type: OTHER
Source sentences:
text: What Years Are Leap Years?
text: Leap year rules: Which years are leap years?
text: The Gregorian calendar addresses this by employing a slightly more complicated set of rules to determine which years are leap years.
text: According to these rules, the years 2000 and 2400 are leap years,
text: Because 97 out of 400 years are leap years, the mean length of the Gregorian calendar year is 365.2425 days; with a relative error below one ppm (8·10−7) relative to the current length of the mean tropical year (365.24219 days) and even closer to the current March equinox year of 365.242374 days that it aims to match.