bissextile

"Since February usually has 28 days, the intercalary day on February 29th of a leap year makes up for the slight difference between the calendar year and the Earth's actual orbit around the sun. "

"My family traditionally celebrates birthdays with a big meal. "

"The apéritifs were particularly stimulating."

"The Olympic Games occur on a quadrennial. "

"The three principal calendars are the Gregorian, Jewish, and Islamic calendars."

"My friends are always there to maintain my confidence when I'm struggling with my studies. "

"The alignment of the students' desks in the classroom made it easier for the teacher to circulate. "

"The three principal calendars are the Gregorian, Jewish, and Islamic calendars."

"This week's math test is featuring fractions, so make sure you study them carefully. "

"February has 28 days, except in leap years when it has 29."

"The Chinese New Year is celebrated according to a lunisolar calendar, meaning its date is determined by both the cycles of the moon and the sun's position in the year. "

"The farmer's agricultural output was very high this year. "