In which quarter is National Day? What day is it?

Analysis: ① According to the knowledge of year, month and day, there are 365 days in a normal year, 28 days in February in a normal year, 366 days in a leap year and 29 days in February in a leap year. Therefore, it is only necessary to judge whether 20 13 is a leap year. The way to judge a leap year is: a year that is a multiple of 4 is a leap year, and a year that is not a multiple of 4 is a normal year. A whole hundred years must be a multiple of 400, and then the first quarter refers to 1 month, February and March, and the second quarter refers to April, May and June. Therefore, Children's Day is in the second quarter. National Day is in the fourth quarter. Because 20 1 1 is not a multiple of 4, 20 1 1 is a normal year, with 365 days in a year and 28 days in February. 365÷7=52 (weeks) … 1 (days), 20 1 1 year ***52 weeks 1 day; So 20 1 1 is a normal year, and there are 28 days in February, which is 52 weeks, 1 day. Children's Day is in the second quarter of a year and National Day is in the fourth quarter. So the answer is: Ping, 28, 52, 1, 2, 4. Comments: Here.