1998 - Help With A Clock Problem

Hi There :)

I'm new, obviously. Joined in the hope that someone here will be able to help me, in fact.

This is a silly one I'm afraid, I feel like a complete idiot.

Whilst trying to adjust the time on the clock on my 1998 Corolla (hatch) I somehow managed to make the clock display vanish all-together. Used to be the radio station would display for 30 secs or so, then the time would replace it....not any more! When trying to reset the clock I was holding down two buttons (various combinations) - I remembered that was how to change the time, though I couldn't remember which two buttons. If I knew which ones it was maybe I could get the clock back!

I'm so annoyed at myself - the time was only off for a couple of minutes, I wish I'd just left it alone! :D

Any hints? :)