The term “dog days of summer” has its origins in ancient astronomy and mythology. Specifically, it refers to a period during the hottest months of the year, which traditionally spans from early July to mid-August in the Northern Hemisphere.

The phrase is linked to the star Sirius, often called the Dog Star, due to its prominence in the constellation Canis Major. In ancient cultures, particularly among the Greeks and Romans, the rising of Sirius coincided with the peak of summer heat. This connection led to the belief that Sirius contributed to the sweltering temperatures experienced during this time.