I am also battling candida, and my doctor tells me it is ok to have one cheat day a week. I am on the diet, taking Nystatin, and doing candida extract injections. I am not sure what exactly you are doing to fight your candida- so not sure if it would be ok for you to cheat that often. However, you should be able to cheat for one day with no real problems.
Enjoy your New Year's Eve!