1) Use it as a warm-up for any of your December lessons: 

    - elicit some words which your Ss might struggle with (e.g. bundle up or comfort film)

    - ask them whether they have already done something/what they are planning to do in December and on New Year Holiday/what they can't do for some reasons. On this stage you can revise the Present Perfect tense, construction to be going to and ways of expressing likes, dislikes and wishes (e.g. I'm into..., I'm/am not keen on..., I wish I could ..., I would like to...). 
   - ask your Ss to add more activities if possible, help them with emergent language. 

2) Use it as a warm-up for any of your December lessons, use all the intructions above, but make it a hook for your future Christmas lesson. It will give your Ss a sense of knowing of what is going to happen and make them wait for your themed lesson more. 

3) Use it as a part of your Christmas/New Year lesson using all the intructions above.