Event Input: Noon vs. Midnight

So given that the input box has an AM and PM radio button, if we want to set an event to occur at noon, how should we set it? If we can't use 12pm to indicate noon, then this input form conflicts with the way digital clocks and computers generally handle this information.

http://en.wikipedia.org/wiki/Midnight

Digital clocks and computers appear to show 12 a.m. for midnight. While that phrase may be used practically, it helps to understand that any particular time is actually an instant. The "a.m." shown on clock displays refers to the 12-hour period following the instant of midnight, not to the instant itself. In other words, 11:59 p.m. shows until midnight; at the instant of midnight it flips to 12:00. Simultaneously, the p.m. flips to a.m., though, strictly speaking, a.m. applies not to the instant of midnight which separates p.m. and a.m.

Here's the problem with how it works:

I enter an event to have start time
19 December 2007 09:35 am

with no end date.

I save it .. no problem.

Then I click edit and change it to
19 December 2007 12:35 am

I save it... the save doesn't take effect. It's still says 9:35am.

So then I edit again. This time I change the End Date (Even though I didn't check the "Event has end date box") and change the time to 1pm. I also change it to start at
19 December 2007 12:35 pm

Now I save and voila...except it now says End: 00/00/0000 12:00am and everything is screwed up. If I try to edit, I get errors.

Somehow the 12pm and 12am times aren't getting converted correctly, Any tips?