Assertion: calendar's day | /r/HasProperty | intercalary
Facets:
Source sentences:
text: Every one of these calendars has a year of 365 days, which is occasionally extended by adding an extra day to form a leap year, a method called "intercalation", the inserted day being "intercalary".
text: The Iranian calendar always begins the year on the vernal equinox and sets its intercalary days so that the following year also begins on the vernal equinox.
text: The Iranian calendar always begins the year on the vernal equinox and sets its intercalary days so that the following year also begins on the vernal equinox.