What day was there no manna?

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:...

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.

It could be any day, lets say.What is the day that is before the 15th but after the 13th. Or it could be that,What is the day that is before the 31st but after the 1st. In the second possibility...

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