Sorry! I realised there was another mistake in the puzzle. Please note that I have changed one of the timings to its correct one. Note that the time that has passed is less than 24 hours. Also, the clocks aren't 24hr clocks, so you won't know if it's showing a.m or p.m.

Need a hint? Drag your mouse over the space below to see:

Find which one is Shawn's broken clock first.

:)
Glen