But what happens when I'm in Michigan and need to call a client in California? It's still relevant that 9 am here is 6 am there. If you eliminate time zones, you'll still have to adjust your schedule based on the fact that their day is about 3 hours behind yours.

We already use a global time in a sense; time zones make GMT into a format that's easier to understand. Knowing that it's 05:00 GMT doesn't necessarily tell you whether you're going to be calling a person in the middle of the night or not.

This is a class where the teacher will try to make you his bitch