Major Heat大暑

Sunrise

In Beijing, as the book records it, the sun rises 26°45′ north of due east.

Three pentads

Each term splits into three five-day pentads, each named for a sign in nature.

1. 1腐草為螢Rotting grass turns to fireflies
2. 2土潤溽暑Ground damp, air steaming
3. 3大雨時行Heavy rains come