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No. YYYY/MM/DD because that is: a) easy to sort b) unambiguous regardless of your preferred convention.

YYYY-MM-DD would be even better.

The point is that MM/DD/YYYY is really terrible idea, and that either one of these suggested options are FAR better than the posted date.

Guess what, DD/MM/YYYY is widely used and much easier to read than the american standard. So don't be a dick.