How many times 29 date come in 400 years?

In a 400-year period, February 29 occurs 97 times. This is because most years have 365 days, but leap years, which have 366 days, occur every four years, except for years divisible by 100 that are not divisible by 400. Therefore, in 400 years, there are 97 leap years, and thus February 29 appears 97 times.