What day is it in Guangzhou?

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:...

Day-to-day. It's a hyphenated word.

No it is not. It can be but it changes every year. Last year it was on my birthday and its on the 19th. So it can br but its not every year!Hope this helps.

Parp.

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...