Assertion: calendar's length | /r/HasProperty | 365.2425 days
Facets:
Source sentences:
text: The average length of a year in the Gregorian calendar is 365.2425 days compared to the actual solar tropical year (time from equinox to equinox) of 365.24219878 days, so the calendar accumulates one day of error with respect to the solar year about every 3300 years.