Fwiw did this before. At a completely odd time (like 2:47) because my watch stopped and i didn't check a phone or computer or any of the 37 other clocks i walked past in the bldg.

I only realized it because i arrived at my them boyfriend's house 20 min away 5 min before i should have left work.

My boss initially didn't believe that nobody would've caught it... but nobody did. Boss later found it hilarious.