Good Morning.

We second all that, morning everyone...

 'Good day' is an Austrailian greeting i think Cathy, meaning hello. In England we usualy say 'good morning' as a greeting up to noon, 'good afternoon' upto about 6pm and 'good evening' after that. When we are leaving someone during the evening or night we say 'Good night'. However the younger generation tend not to use these greetings now and just use 'Hi' or mumble 'whatever' (lol). When meeting people we usualy say Hello and look them in the eye, hopefully with a smile. There are certain areas (notably around the london area) where 'strangers' tend not to talk  or interact unless unavoidable, away from there you will probly find a warm welcome from passers-by. When greeting someone for the first time, a firm handshake or even a quick 'hug' is a sign of friendship, some may even offer a continental kiss on the cheek and again around the London area they may kiss 'thin air' on both cheeks (this IMO appears to be a false greeting). Failing all these greetings if you are unsure, a smile and polite 'nod' of the head will sufice. Hope this has been of use to someone.

Thanks, Cathy.