It doesn't matter if it's November or New Year's Day, just go. If you want to see them on a holiday, you need to see the person in charge of the day at the main gate office, and then you can go to the visitation window and wait after they agree. The doorman is very nice, she will help you.
You can bring food in, it's not as strict as in foreign prisons. But everything has to be checked
If you want to send clothes in, you can't buy clothes for outside wear, or clothes that are too bright, only light-colored clothes for inside wear are allowed inside
The guards will be able to help you.