What does Christmas represent to the WW?

[Alia]

No: HPFGUIDX 95206

Hi, all!  Wow, this is my very first post.  My name's Alia, and I've 
decided to come out of my shell after a year of 
lurking. *throws confetti*

Forgive me if this has already been mentioned, I searched the post 
archive regarding this subject, but I didn't find anything.  Now, I 
was thinking about certain holidays in the books: JKR mentions 
Christmas, Easter, and Halloween.  Of what significance are these 
holidays in the WW?  I know that Christmas and Easter are highly 
regarded in some Christian sects, while some don't acknowledge 
them.  Halloween, according to many Christian relatives and friends, 
isn't quite viewed the same way; it was/is thought more of as a 
pagan holiday, or an "evil" day, preceding All Saints Day.

In the US ed. of OotP, Easter was mentioned at least twice in 
passing ("It was the first day of the Easter holidays..." pg. 651), 
but we do know that Christmas is celebrated (they have decorative 
trees, give/receive gifts, etc.).  I've known two definitions of 
Christmas: Dec. 25th being the birth of Jesus OR, Dec. 25th being 
the sun-worshipper Nimrod's birthday.  So as far as the WW is 
concerned, which is it?  Do they know, or believe in God and Jesus 
in the same way we do, if at all?  What do you think JKR was trying 
to get across, being a Christian herself?
  
I do apologize in advance for rambling, and to anyone who may be 
offended, I would just like to know what you brilliant posters 
think.  Thanks.

Alia, who is waiting for the first tomato