Time zones sometimes seem positively eccentric, affected as they are by political, geographical and social changes in the real world. The BBC have put together a Web tool to explain the different zones around the world.
As irregular as they are, if you want to divide the world up into time zones, you need a way to measure time. The BBC have made a tool to see all the different time zones around the world. This is a great warm up for thinking about time zones, or researching the history of time zones.