He's a bit early (at least according to Brewer's Dictionary of Phrase & Fable)

St. Martin. Patron of drunkards, to save them from falling into danger. This is a mere accident, arising thus: The 11th November (St. Martin's Day) is the Vinalia or feast of Bacchus. When Bacchus was merged by Christians into St. Martin, St. Martin had to bear the ill-repute of his predecessor

We drunkards appear to be doubly blessed, for we also have another patron saint:

St. Vincent. Patron saint of drunkards.This is from the proverb:

If on St. Vincent's Day (Jan 22) the sky is clear
More wine than water will crown the year.