Makes the idea of it seem quite silly

Bad Analogy, it's like having a race track, and you start, get half way, then a mile of the track is moved from the beginning of it to the end, thus you have travelled over that piece of track twice, and have travelled an extra mile.

Now imagine 12 p.m. being switched to 12 a.m. So the middle of the "afternoon" would effectively be "midnight."