I literally cannot listen to Christmas songs unless it's December.
Then I ADORE them.
Well.... I say that by there is one Christmas song that I can listen to at other times of the year:
The Pogues and Kirsty McColl - Fairytale of New York
Apart from that this list of of songs can only be listened to in December (mostly):
Slade -
Merry Xmas Everyone
Wizzard -
I Wish It Could Be Christmas Everyday
Band Aid -
Do They Know It's Christmas?
Shakin' Stevens -
Merry Christmas Everyone
John Lennon & Yoko Ono -
Happy Xmas (War Is Over)
Mike Oldfield -
In Dulci Jubilo
Murray Gold -
The Stowaway (Performed by Yamit Mamo)
I also like most of the more traditional Chritmas songs and
Celtic Woman made a Christmas Album with a load of traditional Christmas songs and their voices are angelic, so I'll post links to their versions:
White Christmas
Let It Snow
Silent Night
Panis Angelicus
Carol of the Bells
The Christmas Song