I had never heard the use of cardinal numbers in dates when speaking until I moved to New Zealand. It seems particularly prevalent in TV and radio advertising, but doesn't seem to follow either British or American "standards". As a Commonwealth country, dates are usually written in the British order, but I often hear them spoken thus:
24 October 2010 as twenty-four October two-thousand and ten
or without a year:
1 November as one November
Not using ordinals in dates seems "American" to me, but I guess Americans would prefer:
October 24 2010 as October twenty-four, two-thousand-ten
Is the first way unique to New Zealand or is it used in America too?