24-hour clock sounds much better. I never knew there was anything but military time to call it; never knew that anybody outside the military used such a confusing thing. If the hours in our days were evenly divisible by 10, I wouldn't mind--that would be an easy calculation. But I have never had any reason to memorize the "12-plus" tables (as it were), so it always takes me a long time to figure out 12-plus-what equals x. Yes, I know it would be quicker to figure x-12 = n, but I don't like doing it that way. (Yes, I know I'm weird.) I'll take my regular clocks any day.