An intercalary day in the calendar, esp. that of leap-year, February 29th.
1600. Holland, Livy, XLV. xliv. 1232. This yere leapt, and the leap day was the morrow after the feast Terminalia.
1712. Swift, Jrnl. Stella, 29 Feb. This is leap-year, and this is leap-day.
1833. Herschel, Astron., xiii. 412. The surplus days thus thrown into the reckoning are called intercalary or leap days.
1896. Daily News, 22 Jan., 5/4. Rossini was born on February 29 (or ‘leap-day’), 1792.
