What is the second 2.28 in the leap year of the solar calendar?
Our lunar calendar is equivalent to the lunar calendar. First of all, like the lunar calendar, the time for the moon to circle the earth is one month, with 30 days in the big month and 29 days in the small month, and then 12 months is called a year, which is called a normal year. However, the time for the moon to orbit the earth is only over 354 days, with a difference of 209 days every 19 years, which is nearly 7 months. We are used to arranging these seven months in seven years, and these seven years have 13 months, which is called leap year.
There are also 24 "solar terms" in the lunar calendar year, indicating different seasons and climates. These 24 solar terms are inserted in 12 months, and each month has two solar terms: the former is called "festival", which reflects the season, and the latter is called "qi", which reflects the climate. Such as "beginning of spring" and "Rain" in the first month. The former is "festival" and the latter is "qi". Solar terms are arranged alternately in monthly order. The average interval between two adjacent knots and qi is 30 and a half days. However, the average time for the moon to orbit the earth is only 29 and a half days. As a result, next month's solar terms are bound to be delayed by one or two days from the previous month's solar terms. At some point, the gas is not in the middle of the month and then moves to the end of the month. There is only one festival next month, and there is no "gas". Any month with only festivals and no breath is a leap month of last month.
2023 is leap February. This is because there is only Tomb-Sweeping Day in the month after February of the lunar calendar (leap February 15th), and Grain Rain, the "qi" after Tomb-Sweeping Day, falls on the first day of next month, so there will be a month without "qi" after February, so the month without "qi" after February is designated as "qi".
I hope it can help you solve the problem.