Charlie: We are slowly getting used to using kilometers but usually convert things to miles. Even the British and the Aussies know about kilometers so we are really alone with the miles. And talking to some Germans it took me a while to tell them the altitude of Albuquerque in millikilometers.
Kilometers are nice because they are smaller and it seems like you are walking farther. Celsius degrees are a little too big and the temperature signs have to have a decimal place.
But I have realized on the trip that the elephant in the room is time. How did the whole world get bamboozled into the wacky way we make time? Quick, how many days between April 28 and June 7? If it is 9:40 (or 21:40 it is no easier) and you set your alarm for 7:15 how long do you get to sleep? Not higher math but significant mental effort. Harder than the time between star date 45812.6 and 45814.3 but, of course, you need to figure out what the heck the star date units were. Did Star Trek ever address that?
