Wednesday (December 25, 2002).
Christmas Day was on a Friday in 1970.
Christmas Day in 1914 was on a Friday.
Wednesday
2002
Sunday
Thursday
Christmas day fell on a Thursday in 1986.
On a Monday
Wednesday
Saturday
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.