Christmastide

[kris-muh s-tahyd] /ˈkrɪs məsˌtaɪd/
noun
1.
the festival season from Christmas to after New Year's Day.
2.
the period from Christmas Eve to Epiphany, especially in England.
Origin
1620-30; Christmas + tide1
British Dictionary definitions for Christmastide

Christmastide

/ˈkrɪsməsˌtaɪd/
noun
1.
another name for Christmas (sense 3)
Word Origin and History for Christmastide
n.

1620s, from Christmas + tide (n.).