I was diagnosed before Xmas last year, no Xmas goodies for me. My Type 2 diabetes is in control now, though, and I have been allowing myself lots of carb desserts the past 2 weeks. Still good, blood sugar spikes of course, but it goes down back to control. If your blood sugar isn't too high, like below 7, I guess a couple of days eating xmas goodies should be fine. Then back to controlling yourself. This year, I will have some Xmas goodies in normal portions.
My wife craved for some egg pies and asked me to buy from her friend who sidelines as a baker, and I didn't know she had diabetes. I asked her if she ate her own goodies, and her answer was "of course, I've got medicine anyway". Well, not the right attitude, IMHO, but then it made me think that I can try and "enjoy" more carbs. It's been ok for me, I just try to time it when my blood sugar is like 4.4 to 4.8, where the meds are doing their work. This is just me of course, my own risk, so I'm not recommending it, just saying what I have tried.