How many days is the solar term * * *, and summer is * * 15 days, right?

2. Summer solar term is one of the 24 solar terms. The traditional twenty-four solar terms are arranged in strict order, and the days of each solar term are the same, all of which are 15 days. There is no solar term for a few more days, and there is no solar term for a few less days. The same is true of summer solar terms. During the summer solar term, the sun revolves to the position of longitude 120, which is on July 22nd of the Gregorian calendar every year.