February 29th
February 29th, it only occurs once every 4 years!
Kakapo breed only once every three to four years. Breeding season occurs in the summer, when the kakapo's favourite food trees are fruiting.
A leap year is singular--it only occurs ONE time and ONLY in that year. (One) Leap Year occurs every 4 years.
It is called Leap Year, and the day that is added is February 29th. We only get that day once every four years.
It only snows once in a blue moon. About once every few years.
One example of an event that occurs once every four years is the Olympic Games. The Summer and Winter Olympics alternate every four years, providing athletes from around the world the opportunity to compete on a global stage. This quadrennial event showcases a wide range of sports and brings nations together in the spirit of competition and sportsmanship.
every 4 years
Only once or twice in your life time, its not so, you need a booster shot once every 10 years superfuga
would have to be feb 29 since it only occurs every four years
February 29, because it only occurs every 4 years.
February 29, sometimes called "leap day."