To make sure we had plenty of time to ask questions, we took the first bus to Mrs. Mann's house. By the time we arrived it was 11:00 a.m. Seven hours before the planet apocalypse.
We sat on the lower part of the beach, nestled in the sand, the tide occasionally kissing our feet. It was already 5 p.m. and once again I had a bloody ocean before me.
Some novels include them some don't. So, I'm a bit confused. Should I decide based on the context/available information (e.g. the reader knows is daytime/nighttime)? Or I should always include them to avoid confusion?