Is June 22nd the summer solstice? Is it the lunar calendar or the national calendar?

The summer solstice is June 22nd, which refers to the national calendar (also called Gregorian calendar and solar calendar). The summer solstice corresponds to the "summer solstice" in the 24 solar terms (at this time, the sun is located at 90 degrees of the ecliptic, and the festival will be held sometime between June 20 and June 22 in the solar calendar every year).

For Cancer in the zodiac, the date when the sun enters Cancer every year is one of the three dates in the solar calendar: June 20th, June 20th, June 20th and June 22nd. This day is called the boundary day of cancer, and it is also called the day when the sun changes constellations in astrology, which means that the sun will pass through two constellations on this day, so the sun will be in the previous one for a period of time on this day.