CHAT: Dates with the number before the month

Raimondo A. Brown scris:
> I can well imagine that in some areas Yule was celebrated at the turning of
> the year and the Yule log is burnt on New Year's Eve (Nos Calan in Welsh -
> the night of the Calends [of Jan.]).  But here in south east England Yule
> is 25th Dec.
I've been wondering, how do you pronounce '25th Dec.' or '25 Dec.'? Do
you say "twenty-fifth of December," or just "twenty-fifth December?"