"Daytime potty" refers to the act of using the toilet or potty during the daytime. It's a way of describing when someone, usually a child, is learning to use the bathroom during the day instead of wearing diapers or pull-ups. Full definition
My daughter almost 6 wasn't finished daytime potty training until she was 4. (thegarciadiaries.com)
An intense 4 days, and she does not have daytime potty accidents except during naps sometimes. (babywisemom.com)
I know it is a totally different situation from daytime potty training, but I think a product like this would help more than pull ups that don't let her feel the moisture. (latchedonmom.com)