The US system month/day/year is pretty bad, but honestly, so is day/month/year. Pretty much everything else is written from largest to smallest unit. Regular numbers: 123, here 1 is the 100s, 2 is the 10s and 3 is the 1s. In money, when a currency also have smaller units, you always say the largest first. “3 dollars, 50 cents.” A digital clock displays the numbers ordered from largest to smallest - 10:45:31. So why are people so proud of the european date format? Writing out a full timestamp would switch from increasing to decreasing units.

ISO-8601 is the only sensible choice.