leap dayn.
/ˈliːp deɪ/, U.S. /ˈlip ˌdeɪ/ An intercalary day in the calendar, esp. that of leap-year, February 29th.
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the world > time > reckoning of time > [noun] > adjustments in calculations > leap year > intercalary or extra day in
bissext1398
leap day1600
epact1603
bissextile day1708
1600 P. Holland tr. Livy Rom. Hist. xlv. xliv. 1232 This yere leapt, and the leap day was the morrow after the feast Terminalia.
1712 J. Swift Jrnl. to Stella 29 Feb. (1948) II. 500 This is leap year, and this is leap day.
1833 J. F. W. Herschel Astronomy 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.
This entry has not yet been fully updated (first published 1902; most recently modified version published online March 2022).
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