When someone talks about dog days, they either mean those blisteringly hot days in the dead of summer or they’re referring to a period of stagnation. Either way, dog days are draining days.
The traditional “dog days” of summer fall between early July and mid-August and are noted for their extreme heat and humidity. In the Mediterranean, this period coincided with hot days that were plagued with disease and discomfort.
Sirius is the “dog star” from the constellation Canis Major (Latin for “Big Dog”), hence the name. Sirius, the “dog star,” is within the constellation Canis Major and is the brightest in the heavens.
During this time of year, the star Sirius is at its brightest and can be seen rising alongside the sun. In fact, the feast day of Saint Roch, the patron saint of dogs, just happens to be August 16.
Natalie Babbitt’s book, The Prologue of Tuck Everlasting was published in 1975 and is set in the first week of August. In the novel, the author wrote:
These are strange and breathless days, the dog days, when people are led to do things they are sure to be sorry for after.
There is a very descriptive use of the phrase “dog days” in Charles Dickens’ 1843 novel, A Christmas Carol, that states:
Oh! But he was a tight-fisted hand at the grind-stone, Scrooge! A squeezing, wrenching, grasping, scraping, clutching, covetous, old sinner! Hard and sharp as flint, from which no steel had ever struck out generous fire; secret, and self-contained, and solitary as an oyster. The cold within him froze his old features, nipped his pointed nose, shrivelled his cheek, stiffened his gait; made his eyes red, his thin lips blue; and spoke out shrewdly in his grating voice. A frosty rime was on his head, and on his eyebrows, and his wiry chin. He carried his own low temperature always about with him; he iced his office in the dog days; and didn’t thaw it one degree at Christmas.
And in William Shakespeare’s King Henry VIII written in 1613, Porter and his Man are talking in the Palace Yard in Act 5, Scene 4.
The spoons will be the bigger, sir. There is a fellow somewhat near the door, he should be a brazier by his face, for o’ my conscience twenty of the dog-days now reign in’s nose. All that stand about him are under the line; they need no other penance.”
The phrase actually dates back to the Egyptians. They believed that the star gave off extra heat and humidity to augment the already formidable heat of the sun. In fact, dog days coincided with the annual flooding of the Nile which was important for a good harvest.