How many days are there in February of 20 1 1?

Now the Gregorian calendar, which is used all over the world, has 28 days in February and 365 days in a year. There is a leap year every four years, with 29 days in February and 366 days in the whole year. Set leap year rules: based on the Gregorian calendar era, any year divisible by 4 is a leap year; But every hundred years is not necessarily a leap year divisible by 4, but a leap year divisible by 400. For example, 1968 is divisible by 4, which is a leap year; 1900 is a year every hundred years, which can be divisible by 4, but not by 400, so it is not a leap year; And 2000 is divisible by 4 or 400, which is a leap year. 20 1 1 This year is not divisible by 4, so it is not a leap year, so February of 20 1 1 this year is 28 days.