July 202311-August 19. The dog days in 2023 last for 40 days, also known as the "extended version" of the dog days, and the time period is: the starting date is July11-July 20 (10 day); Mid-July 21-August 9 (20 days); The last few days are from August 10 to August 19 (10 days), that is, from July 1 1 to August 19 in 2023. The dog days are the time when the temperature is the highest, humid and sultry in a year, which occurs between the light summer heat and the great summer heat, from the middle and late July to the middle and late August in the solar calendar.