I would no more wish an American best wishes on July 4th, Independence Day, nor a French citizen on Bastille Day, or in fact any other nationality on their national day.* This is not out of any spite or petty-mindedness. After all, such dates are not my dates. More importantly, perhaps, there is no ‘cultural equivalence’. What date would or could we Brits conceive foreigners wishing us?
Good Day to you all, whatever your nationality, chosen or otherwise. 🙂
*At least not without prompting, and even then there’s no guarantee.
Life, Faith and Role-Playing Games 
What could a Brit sensibly wish an American, anyway? “Good riddance”?
Is “Happy St George’s/David’s/Andrew’s/Patrick’s Day” not a cultural equivalent over here?
No Mike, I wouldn’t say so, although St Patrick’s Day has been co-opted by the producers and retailers of Irish Stout! The national saints days’ may be a weak echo, but no more. I suspect the whole point is that we have no obvious historical landmarks that have the same magnitude. MAybe I should be grateful, given the jingoistic ballyhoo that they would attract!
No, especially not in England, where celebrating our national saint’s day is viewed with some suspicion. The equivalent would have to be celebrating the anniversary of the formation of our nation in its current form, and no matter which “nation” you choose (UK, GB, England…) it was a very long time ago indeed and in some cases quite hard to pin down. When was it that Alfred the Great unified England? When did Wales become a nation? When did it get unified with England? (“Not yet” might well be the answer there!)
http://en.wikipedia.org/wiki/United_Kingdom
“The 1707 Acts of Union declared that England and Scotland were “United into One Kingdom by the Name of Great Britain”…”
“The unified kingdom of Great Britain came into being on 1 May 1707..”
But I doubt if many people know that – I certainly didn’t until a few minutes ago.
And then there’s: “The Acts of Union 1800, united the Kingdom of Great Britain and the Kingdom of Ireland in 1801…”