According to the perpetual calendar, Tanabata generally refers to Chinese Valentine's Day. It is a traditional folk festival in China. Chinese Valentine's Day, which evolved from the worship of the stars, is the birthday of the seventh sister in the traditional sense. Because the worship of the seventh sister was held on the seventh day of July, it was named Tanabata. Chinese Valentine's Day is on the seventh day of the seventh lunar month, corresponding to August 22nd, 2023 in the solar calendar. Tuesday, an illegal holiday.