Greenwich Mean Time (GMT) -- Everyone on Zulu

My friend Mike submitted this idea. I’m not sold on it yet, but I'll put it in here to illicit comments.

Abolish time zones. Everyone should be on a universal time with a 24-hour clock. One time for the world. This would not change how anyone conducts business, it would only change the man-made time they do it. For example, instead of being open from 0900 – 1600 (24-hour clock), the New York Stock Exchange would be open from 1500 – 2200. No change in business and no change to the fact that the sun is up while they are open.

Implementing this would be hard. I don't think you could get many countries outside the zulu timezone to go along with it, but it may be a good idea.

People are used to it being 12:00pm when the sun is directly overhead. It would be hard for people to get used to 1200 as the middle of the night. Having said that, the military does its worldwide operations on zulu time (GMT) and gets along fine. It can be done. It's only a matter of should it be done?

Please share your thoughts.