I have made the suggestion to the powers that be.
That said, and even though it would by definition water down my vote, I am absolutely in favor of extending the voting a day or (perhaps more fairly) two days given this confusion.
Ironically, I program surveys for (a good part of) my living, and it's precisely to avoid this sort of confusion that I always program surveys to close at 11:59 PM. That said, 12 midnight in my world does mean 24:00, not 00.00.
Doing some reading, however, the consensus on the issue is that there is no consensus on the issue.
Gee. Thanks guys. Good job on that standardization thing.