Hey, I'm from Canada, so how about we make things more confusing?
Here we have three systems. Metric, US Imperial, and Normal Imperial. Normally the two imperial systems are pretty similar, but then there's a few things that are different. Like for example, how much liquid is actually in a gallon.
I also only have experience cooking with imperial measurements, but could never tell you what the outside temperature is in Fahrenheit. I also use Kilometres instead of Miles, but normally use Feet instead of Metres. I also only know outside barometric pressure in inches of mercury.