There are 29 days in February of leap year and 28 days in February of normal year.

According to the question, Xiao Liang's birthday is the last day of February in leap year, that is, February 29th.

Extended leap year:

The year is a multiple of 4, but not a multiple of 100. For example: 20 16.

The year is a multiple of 100, and it must be a multiple of 400 to be considered as a leap year. For example, 2000 is a leap year, and 1900 is a normal year.

Average year: A year other than leap year.

There are 365 days in a normal year and 366 days in a leap year, because there is one more day in February.

Remarks If you forget the knowledge points when tutoring children, you can look through the textbooks and generally find the corresponding knowledge points.