Tallima: See, this is what I don't get. Who cares what the label is? It makes sense to have a clock represent something we can agree upon. If 1pm or 12pm is when this sun is highest, that's fine.
timppu: Moving the clock forward so that one can leave work earlier is the wrong solution to the problem. The right solution would be to change the time that person (or everyone who so wishes) go to work, and leave work. So if earlier you went to work at 9 am and left 5 pm, you should go to work at 8 pm so that you can leave at 4 pm.
The reason I promote not moving the clock to "summertime" (even permanently) is because the idea of the sun being at its highest at 12 o'clock makes it easier to predict different things, like if you see the sun is rising at 7 am, it is easy to calculate that it will set at around 5 pm, and so on and so forth.
"So what if sun it at its highest at 1 pm instead?" Or 2pm? Or 4pm? Gee, maybe 9pm? There is a reason we have a clock, to easily predict and tell at which point of the day we are, even if we are not farmers. Moving it around for wrong reasons makes it harder to use it for that purpose.
I'm a fan of 12pm, but that's what got us into this mess of time zones. What if we had one time? What of 6am was 6am everywhere? Or we just called it 600? That's what they do in China and it works great. If I have a business meeting at 8pm, then it's 8pm. If I try to have a business meeting with someone in Florida, Indiana, Arizona, and Sweden, there are an insane number of facts I need to know. Has Florida legislation passed, what city in Arizona, what county in Indiana, does Sweden change clocks and when, and what month and day is it? And then I have to figure out which of all of things change their time.
There are technologies to help with this, but I'd rather have midnight be when the sun is at 45 degrees west than the insanity we are all using for time now.