For what it's worth, I've received a lot of flack from people about that holiday.
As for me...
Scientific - Metric is best
The Rest of Normal Life - Customary ALL THE WAY!
I weight 200 pounds. I have no idea what that is in metric.
I just drove about 12 miles to the hot springs. (Don't care what that is in km.)
-Steve
www.ColoradoGuy.com