Y no rename?
Stupid convective thought.
Many serious Christians make a point of avoiding Christmas and Halloween because both are leftovers of pagan holidays.
Why don't they have their own names for days and months?
All of the days in English are Teutonic or Roman pagan gods. The sun-god, the moon-god, Tiw, Wotan, Thor, Freya, and Saturn.
The first six months are Roman pagan gods and festivals, followed by two Roman emperors, followed by secular numbers.
There are lots of saints and martyrs and prophets in any denomination, and it wouldn't be hard to associate them with days or months.