Is today a new day?

July 16, 2022 entered the dog days, which was Saturday, June 18th of the lunar calendar. As the saying goes, "long summer ambushed in the third Geng day", which means that long summer ambushed in the third Geng day. "Geng Day" means that the date of the main branch year contains "Geng". The summer solstice in 2022 is June 2 1 in 2022, the dry branch date is the fourth day of March, and the third Geng day is the fourth day of April, that is, July 16 in 2022, so this day is the beginning of the dog days in 2022.