How do I turn on the notifcations when my screen is off?

[AC Question]

I can no longer see any notifications when my screen is off. The only thing I am able to view is the time (no date). I used to be able to see if I received an email or text message when my screen was off and am not sure what caused it to no longer show.

 

[B. Diddy]

Welcome to Android Central! Which phone?