1. There is a 15-day difference between Minor Heat and Major Heat.

2. Great Heat, one of the twenty-four solar terms, is the last solar term in summer. Every year between July 22nd and 23rd in the Gregorian calendar, the sun reaches 120° in the lunar calendar, which is the Great Summer solar term. Like Xiaoshu, Dashu is also a season that reflects the heat of summer, while Dashu means that the weather is extremely hot.

3. Xiaoshu is the eleventh of the twenty-four solar terms of the lunar calendar, and the fifth solar term of summer, indicating the official start of the summer season.