How many days are there in February in a normal year?

The number of years in A.D. can be divisible by 4 as a leap year, but the number of whole hundred years (both digits are 0) must be divisible by 400 as a leap year (for example, 1900 is not a leap year), and everything else is a flat year.

February, February is the second month of the solar year, with 28 days in a normal year and 29 days in a leap year. There have been three times in history, and there are 30 days in February. In the northern hemisphere, February is the third month of winter. This month's solar terms are: beginning of spring, it rains. February in English comes from February in ancient Rome and may also come from Sabine.

Extended data:

A year without leap days in the solar calendar or leap months in the lunar calendar is called a flat year. The average solar year is 365 days, the average lunar year is 354 days or 355 days, and very few days are 353 days. From 5000 AD to 900 AD, there were only 353 days in the following years:

780, 1620, 1965, 2372, 3620, 3903, 3965, 4 186, 4248.

In some areas, the average year also refers to the year when the crop harvest is very common.

A year with a leap month in the lunar calendar is called a leap year, and the lunar calendar adopts the method of 19 plus 7 leap months, that is, the "7 leap year method of 19", that is, the lunar calendar 19 has 7 leap years.