Daylight savings confusion

Monday I had some very mixed up students. One in fact was late for class because his cell phone had automatically adjusted to the time change on the weekend and that was his alarm clock. More confusing yet is that neither Saudi Arabia nor China change to daylight savings time yet here their electronic clocks mysteriously changed. When I started to try and explain the time change with the map I realized the late student was not yet really awake because he was looking for Saskatoon in the country of China.

I thought most of this confusion made sense in parts of the country and the world where the time is actually changed, but apparently it carries over to Saskatchewan.