Canicule and Dog days

Canicule noun - The hot period between early July and early September; a period of inactivity.

Dog days is a synonym for canicule. In some cases you can use "Dog days" instead a noun "Canicule".

Dog days noun - The hot period between early July and early September; a period of inactivity.

Canicule is a synonym for dog days in very hot days topic. You can use "Canicule" instead a noun phrase "Dog days".