Later in the year is better, IMHO. I too seem to have accidentally succumbed to this "Dry January" fad (does that mean that you can drink dry white wine, dry gin, dry martini etc. but other drinks are out?). At present the only weekend for which I have a definite commitment is that of 22nd Feb, although I really ought to keep 8th Feb free: that date is Aunt Phyllis's 95th and we may have a small celebration with her, given that she doesn't tend to go out any more.