Simple Definition of dog days
: the hottest time of the year
Full Definition of dog days
the period between early July and early September when the hot sultry weather of summer usually occurs in the northern hemisphere
a period of stagnation or inactivity
So why the Dog Days of Summer? It's not like dogs are the only animals suffering in the midsummer heat. As it turns out, the canine in question isn't a pooch at all, but a constellation and the story takes us back to ancient Greece and Rome.
According to National Geographic, "To the Greeks and Romans, the “dog days” occurred around the day when Sirius appeared to rise just before the sun, in late July. They referred to these days as the hottest time of the year.
So send in your best pet pics and leash up Fido for the spectacular parade. All proceeds benefit the ASPCA.