[draxofavalon]

I would like date pickers to have years on left, then months and then days; that would be more intuitive at least for me because I tend to choose from left to right.

[s_kilk]

YYY-MM-DD also sorts lexographically, making it the perfect date format.

[ben174]

ISO-8601 https://en.wikipedia.org/wiki/ISO_8601