If you are talking about deleting both the playlist file and also the song files themselves, then you’ll have to delete both. Deleting the playlist does only that; deletes just the playlist file. You’ll have to go through and delete the song files separately. Quicker & easier to do on the computer, rather than using the on-board DELETE SONG function.
In the future, or now for next year, consider putting all of your Christmas collection on a micro-SD card. A 2GB card should be sufficient. They are really in-expensive now. I’ve got about 20-30 CD’s worth (didn’t really count them) totalling 324 songs ripped at 256 kbps on one. 17 hours worth of holiday tunes. And if you create an .m3u playlist, it will be stored in the MUSIC folder (or root) of the card, so it will automatically pop up on your player when you insert the card. And it won’t be there when the card is out. You just have to remember where you stored the card in a year from now.
Alternatively, you can also rename the GENRE field in the ID3 tags of the seasonal songs to ‘Christmas’, and then just play that genre when the season rolls around again. Does the same thing as a playlist. And it’s very simple to do in MP3Tag. :smiley: