What's the date of summer? 202 1 Summer is the date of 202 1.

2. Long summer is the seventh solar term in the twenty-four solar terms of the lunar calendar and the first solar term in summer, which indicates the official start of summer. The date is May 5th or May 6th of the Gregorian calendar every year. When the temperature rises obviously, the summer heat comes, thunderstorms increase and crops enter the peak season, people are used to taking long summer as an important solar term.