On your computer, go to iTunes.
Go to Genres: Christmas and Holiday.
Select all songs in each Genre.
Right click and from the popup window go to “Uncheck selection”. Now none of these songs are checked.
When you connect your iPod to the computer, click on iTunes and then highlight your iPod.
Under the Summary tab for the iPod, check the “Sync only selected songs” box.
Click the Sync button and say goodbye to Christmas!