Time Zone Discussion

In today's class we discussed a fairly interesting topic. We discussed weather or not the whole earth should have the same time zone. I personally think that this would be more convenient but it would also be going against science. Scientifically the morning starts a couple of hours before the sun rises, and the sun doesn't rise at the same time around the world. The terms A.M and P.M would have to be dropped because they wouldn't be accurate in all places of the world. It would keep everyone in more track of times globally and when traveling to different time zones nobody would gain or loose hours of their day. This brings me to the second term we discussed which is the question of the present. Thinking about it, there is no present. Everything is in either the near past or near future. When putting a lot of thought into these topics, your mind starts to hurt.