DE-Americanisation mode would be helpful
For non american users it is a must.
Why do I want to search a US website (facebook, linkedin, twitter etc) in the US when I've never been there and live in Australia.
The dates are american the recommendations are american, we don't use the term "zip code" either.
International conventions annoy everyone the same amount and if adopted in the first place no changes would be necessary now
Keep up the good work