The one that puts the sun where it belongs at 12
The bigger question is why? Now that we have electric lights, why do you want equal daytime before and after noon?
On the eastern edges of current time zones. There's a 45-minute to 55-minute difference to cities on the western borders and many of them daylight time would be closer to "natural noon" than standard time.
I could also try and get my coworkers to move our meetings earlier in summer so I can leave work by 3, but for some reason changing a "clock" seems to be more effective than getting people to buy into summer hours and winter hours.