Christmas Day in 1914 was on a Friday.
Friday
Sunday
Thursday
Christmas day fell on a Thursday in 1986.
Saturday
Wednesday
On a Monday
Monday
It doesn't matter. Christmas Day is not influenced by the day of the week it is on. It always feels the same, no matter what day of the week it is on. So whether it is on a weekday or a weekend, there is no difference. So no day is best for Christmas Day to fall on.
Leap day does affect which day of the week Christmas falls on, but Christmas will always fall on the 25th. Hope this answered your question!
Christmas Day is great no matter what day of the week it falls on. When it is Christmas Day the day is completely different to any normal day of the week, so whatever day it is doesn't really matter.