I don’t know the episode, but unless that’s some extremely official time piece controlled by the government or something, it could just be someone like me. I live in the US, and several of the temp gauges in the house are celcius, including the one I keep at my desk and my in room A/C (set at 25 atm).

I also used to keep my car on km/h instead of mph just for fun and confusing anyone who rode with me why I was going 80 on local roads or 130 on the highway.