Noun: intercalary year
- In the Gregorian calendar, a year with 366 days including 29th February; usually any year divisible by 4 is a leap year, with the exception that centenary years are not leap years unless divisible by 400
"2024 will be an intercalary year";
- leap year, 366 days, bissextile year
Derived forms: intercalary years
Type of: twelvemonth [archaic], year, yr
Encyclopedia: Intercalary year