366 Days Are in One
This page is the CodyCross answer for the clue below from Welcome to Japan, Group 566, Puzzle 2 (Tanegashima Space Center).
Question is: 366 Days Are in One
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.