- Dog days
The dog days of summer are those days when the heat is the greatest, usually between mid-July and early September. They are named for Sirius, the Dog Star, which is the brightest star in the sky. Sirius is hotter and more massive even than our sun. The ancient Greeks and Romans believed that Sirius caused summer, as its hottest days coincide with the emergence or rising of this star after being lost in the sun's luminance.
- Date modified: