Why does the date and time box appear on the screen everytime I turn on my digital camera ?

Question

When you enter the date and time it doesn't retain it.

Answer 1

read the instruction book, it may be your back-up battery- needs a new one, check it and see..

Answer 2

I suggest that if you are looking for a serious answer, you need to give more information, maybe there is someone with the same model camera or could tell you how to obtain a manual if you don't have one.