Infinitely wrong
Even a broken clock is right twice a day. I love that phrase.
Here's a new one. Many working clocks are wrong infinitely many times per day. How can that be? There are infinitely many decimal numbers between any two integers, say 1 and 2, and unless a clock has a sweeping second hand that is set perfectly, it can't correctly represent any of them.
Really, even a perfect sweeping second hand can't possibly represent every decimal number, because decimal numbers can be infinitely precise, but fundamental particles and therefore movement can only be so small.
I think that's all correct, anyway.
Here's a simpler version: All clocks are wrong.