hey mate look at what you have acheived so far:
you stayed sober over the holidays, very hard, especially when it is normally considered party time, time to let your hair down, you got through your first days back at work without a drink, again an awesome effort.
so you have created new patterns "when i am holidays i dont drink", "when i am at work i dont drink"
today is the opportunity to create a new pattern called "on my day off i dont drink".
you have done the others so well, this should be a doddle for you, just break the pattern, my days off i drank cool drink, watered the garden - take spot for a work, do other relaxing down time things!!
good luck love
kath