a persons birthday on the day of a leap year
The letter "Y."
The letter M.
Halley's Comet returns to the part of its orbit visible from Earth.
Five ?
A synonym for every five years is quinquennial: as an adjective describes something that happens every five years or that lasts for five years; the noun means the fifth anniversary or a period of five years.
There is an internet hoax going around claiming that certain occurrences of five days in a month occur every 823 years. For examples, in October 2010, there were five Fridays, Saturdays, and Sundays. However, this occurrence occurs at the most every 11 years. The next time five Fridays, Saturdays, and Sundays occurs in a month is March 2013. The next time it occurs in October is October 2021.
Every 4 years
every two years
4 years 4 yearsThe Summer Olympics are held once every 4 years.
every 4 years
no, 4 years
vicennial
4 years.
Every person should refinance their mortgage after five years.
NO every 4 years
no it occurs in every 4 years