I must admit, it took me a while to get my head around the fact that America has different time zones within the same country
It took me a while to get my head around the fact that China has only one time zone for the whole massive country, which goes across five standard time zones. So in the summer the sun can be in the middle of the sky (so what you'd think should be about noon) at 7am in the eastern regions, and in the winter you don't get sunrise till 10.30am in the western regions. It must be really weird! You go forward 3 and a half hours just by walking across a border!