noun
210th day from the first day of spring; storm day
A traditional calendar date marking the 210th day after the beginning of spring (risshun). It falls around September 1 and is associated with typhoons and storms that can damage rice crops. The term is culturally significant in agriculture and weather lore.
二百十日は台風の多い時期として知られている。
The 210th day is known as a period when typhoons are frequent.
For farmers, the 210th day is a day to be on guard.