The following list of dances was contributed by Claire Eymin from Grenoble (France). Claire says:
Please bear in mind that it is purely my own selection and not everybody would agree on them all being Christmas/Winter themed.
If you have further suggestions then by all means send them in.
The SCD database has a bunch more if you search for words like “Christmas” or “snow” (although you will have to weed out some obvious false positives like The Snowdonia Reel).