The name Tuesday derives from the Old English “Tiwesdæg” and literally means “Tiw’s Day”. Tiw is the Old English form of the Proto-Germanic god *Tîwaz, or Týr in Norse, a god of war and law. *Tîwaz derives from the Proto-Indo-European base *dei-, *deyā-, *dīdyā-, meaning ‘to shine’, whence comes also such words as “deity”. – Wikipedia
We can keep the Christ in Christmas if we can also keep the Norse Gods and Goddesses in the days of the week. Every day but Saturday is named in honor of one of our Gods.