When There Is an Extra Day in February
Puzzle 8 of Time Hard Pack
Question is: When There Is an Extra Day in February
and the answer is: LEAPYEAR
Word Meaning:
LEAP YEAR — A year in the Julian or Gregorian calendar with an intercalary day added to February (in the Gregorian calendar, February 29), used to adjust for the extra hours of the solar year; a 366-day year.
Definitions from Wiktionary.