Biannual Celebration in Summer and Winter
This page is the CodyCross answer for the clue below from Campsite Adventures, Group 823, Puzzle 1 (Binoculars).
Question is: Biannual Celebration in Summer and Winter
and the answer is: SOLSTICE
Word Meaning:
SOLSTICE — One of the two points in the ecliptic at which the sun is furthest from the celestial equator. This corresponds to one of two days in the year when the day is either longest or shortest.
Definitions from Wiktionary.