While I agree in theory, in practice it’s still a bigger problem, as actual infrastructure needs to be changed for the metric system. As was proven with the re

While I agree in theory, in practice it’s still a bigger problem, as actual infrastructure needs to be changed for the metric system. As was proven with the recent change of the DST dates, most calendars are handled by computers these days. It would be relatively straightforward to change the calendar. There would be problems though. Monthly payments for things, for example, would need to be adjusted. So there would still need to be significant lead time.