I must say, it's frustrating clicking this link and landing on a page narrowed to the USA, and, to top it off, in Fahrenheit… Maybe a title change would be welcome.
If you're used to that, it's easy to remember that C = (F-32) * 9 / 5.
Using a random human’s body temperature and a strange random mixture of chemicals as scale points does not make any sense. Might as well pick a random hot day and a random cold day and use that.