The dates should be numerical, ordered and include the complete data. This makes it possible for humans and machines to parse it with minimal thought on the format.
There is no case to be made for using a single regional format globally when the regional format fails on all the required fronts.
The YYYY-MM-DD HH:MM:SS format can be parsed by anyone because it cannot be misinterpreted. It may not be the regional one but it is unambiguous. It contains all the data and humans and machines are both able to ignore data that is not needed while they cannot extrapolate data that is not there. Stripping leading centuries makes sorting ambiguous, removing leading zeroes makes human tabulation and simple text sorting fail. Transposing the digit significance destroys any semblance of data management and makes simple sorting fail. Using natural language month names or contractions of them is a slap in the face of ALL non native language users who have to use mental bandwidth to determine the actual date. English natives would struggle with month names from almost any other language but the reverse affects even more people.
Please default to the best and let users style as desired if so desired.