Why do we still have time zones?

[cowman]

I understand the mechanics of the earth being round and revolving around the sun meaning the sun rises/sets at different times around the world. However, why don't we just schedule our work times/meals/etc based on our local sunrise/set? Do everything on Zulu time, if the sun rises at 1500 where you are, then start work at 1800(or whatever). Whoever decided we have to eat lunch at noon or work 9-5?

Seems like with the world being more and more connected it would make more sense to just have one time standard for the planet.

 

[PeterNSteinmetz]

Remember when Swatch tried to introduce internet time with 1000 beats per day and the same everywhere and the prime meridian in Biel, Switzerland. I actually liked the idea but it never really took off.