I am writing a little about both Christian and Orthodox Christmas. first comes the Christian Christmas then on January 7 you have Orthodox Christmas that is also celebrated in Ukraine. Do not be fooled by the fir tree that is a new years tree and is celebrated as an even bigger holiday.
New years is quite a big holiday with people walking around with saint nick or as its called in the western world Santa clause hat. almost every city will have decorated trees and a fireworks display for new years. it is celebrated with friends family and a lot of food. the best part is most Ukrainian women are quite good at cooking. you can expect they will go all out for new years with soups meats cheese and if your lucky a goose.