I can't help but feel a great pride today. I was born in Australia but my heritage is Greek.
28 October 1940
The day the Greeks said NO to the Italians.
It was very significant at the time and had a real affect on the war in Europe.
Eventually Hitler had to send German troops to Greece to do what the Italians couldn't but that's another story (and involving Australian troops in Greece).
Further reading here.
Ultimatum in Greece | Neos Kosmos