bn:00010723n
Noun Concept
Categories: February, Types of year, Articles with short description, Old Style leap years, Wikipedia articles incorporating text from the 1911 Encyclopædia Britannica
EN
leap day  bissextile day  February 29  2/29  29/2
EN
The name of the day that is added during a leap year WordNet 3.0
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EN
The name of the day that is added during a leap year WordNet 3.0 & Open English WordNet
February 29 is a leap day or "leap year day", an intercalary date added periodically to leap years in the Julian and Gregorian calendars. Wikipedia
Day of the year Wikidata
An extra day intercalated into a year, especially the day intercalated into the Julian calendar every fourth year and into the Gregorian calendar every fourth year excepting centuries not divisible by 400, usually reckoned as February 29th. Wiktionary
Extra day in a leap year. Wiktionary (translation)