It’s not a bad idea to use a familiar tune with seasonal songs, as they can’t be sung all year.
This text is set to O WALY WALY in 3/4 time, which is used for many other hymn texts. It is public domain and the sheet music is available at various places on the internet, including at Hymnary.
The Christmas song has words by Michael Perry. The text is at Jubilate.
I have reused this backing from elsewhere on the blog.