The dog days are the hottest, most humid days of summer, and do not have any specific dates. Depending on the location on Earth, the dog days start and end at different dates. Dog days were...
What exactly is the question
They are quite close in meaning. "Day by day" refers to process and the passage of time, such as the famous dictum of Emile Coué: "Day by day, in every way, I get better and better". Other examples:...