leap day in English
noun
1
the intercalary day in a leap year; February 29.
So every four years a leap day is added to the calendar to allow it to catch up to the solar year.
noun
bissextile day
Use "leap day" in a sentence
Below are sample sentences containing the word "leap day" from the English Dictionary. We can refer to these sentence patterns for sentences in case of finding sample sentences with the word "leap day", or refer to the context using the word "leap day" in the English Dictionary.
1. A period of four years ending on a leap day was to be called a "Franciade".
2. A leap year is a year in which an extra day is added to the calendar in order to synchronize it with the seasons.Since the tropical year is 365.242190 days long, a leap year must be added roughly once every four years (four times the fractional day gives ).In a leap year, the extra day (known as a leap day) is added at the end of February, giving it 29 instead of the usual 28 days.