It's normal for holidays to be triggers for a lot of us. Most drinkers use any occasion as an excuse to drink, but holidays are easy because a lot of people are doing it so we're just part of the crowd. I try to remember and focus on the fact that I'm not like everyone in the crowd. I'm not able to have a couple of drinks and relax and have fun and stop. For me, the drinking would continue long after the fun stage, and I'd have to deal with unpleasant consequences for days afterwards between health,work,behavior,etc. Holidays now are a lot calmer, and if I go to any parties I keep my time there very short. Long enough to visit but not long enough to get myself in trouble.
Good for you for staying strong. You'll be able to start the week off right, and really won't miss anything.