My alarm clock clearly knew it was April frigging Fool's Day.
My alarm, on weekdays, goes off at 7.01 am: for that, reasonably enough, is that time at which it is set to go off.
Beep beep beep beep beep (etc).
Wha...uh? It was still dark, and the clock said 12.00. I pressed snooze all the same, then thought, WTF? I pressed on the alarm setting, and the alarm was set at 12.00 also.
Hmm. I found my mobile phone, according to which the time was 1.54 am. Charming - so my clock had somehow managed to reset itself to 12 am. Fortunately I was sleepy enough for this not to be a major disturbance, I was back to sleep within minutes of setting it back to the proper time.
Beep beep beep beep beep (etc). (You should hear an alarm clock say etc, especially when it's parenthesised.)
12.00, said the digital display. I sighed. It was still dark outside. I switched the alarm off, and checked the real time again, c/o my mobile. 3.10 am.
I reset it again, doing the same for the alarm time, and back to bed - and thankfully back to sleep just as quickly as before.
My clock has never done this before. It had better not bleeding well do it again tonight.