This get posted kind of frequently. but just to point some things out.

day/month/year and month/day/year are both retarded. year/month/day is the best for sorting order and information. day/month/year sorted will give you every 1st of January, from 1 through 2012, before a 2nd of January. year/month/date; you get the time period first, the time of year second, and the time of month last. This is useful for history.

Fahrenheit isn't based on some random arbitrary numbers. Educate yourself. It was originally based on a salt/ice/water solution = 0, ice water = 32, and human body = 96. This got thrown out and was just based on ice water and the human body at 96 (which turned out to be wrong). Thus if ever without another thermometer, you could create your own. If you notice difference between salt/ice/water to freezing (32) and ice water to human body (64) are both base two numbers. So dip thermometer in ice water, make a mark (32), put thermometer under arm, put a mark (96). Now place a halfway mark (64), now two mark hlway between the 3 marks (48,80), keep going and you will have whole numbers until you get a halfway between 32 and 33 size differences. It is useful in that sense, celcius is harder 0 to 100, halfway is 50, halfway is 25,75, halfway is 12.5,37.5,62.5,87.5. It gets messy.

Think of it this way. It is easier to take a long length of rope and cut it into 64 equal length pieces, then it is to cut a long rope into 50 equal length pieces.

Measurements of length are the same thing to. Based off the human body, and easily reproduced.

TL;DR If civilization collapses, Fahrenheit/Empirical system will survive in some form, Celcius/SI will crumble.