My friends and I are looking into seeing Honeymoon In Vegas before Xmass time. Since it was on TDF last week for pretty much all of the performances, we were wondering if assuming it will be on again before Xmass time, when does TDF usually update their list of available shows?
TDF updates constantly. Multiple times during the day Monday-Friday, and sometimes on weekends (though less frequently). Your best bet is to just keep checking, especially close to the date you might want to go.
Between Thanksgiving and Christmas is when the shows are doing better, with the influx of tourists. Before Thanksgiving and after New Years, not as much...
By Xmas break do you mean between Thanksgiving and New Year's? If so, no, you probably won't be able to get Broadway shows during that time. They usually pull their discounts because that's when they do big business.