The Obama administration has directed the military to not allow personnel to say “Christmas”, in spite of the holiday’s status as a federally-recognized holiday.
The reason given by armed forces officials is that not everyone celebrates Christmas and that out of respect for them, military members should refer to Christmas celebrations simply as “holiday”-themed festivities.
This prohibition comes in the context of a wider push for political correctness in society in general and the military in particular, as evidenced by the recent reprimanding of Navy Chaplain Wes Modder for simply discussing religion, as chaplains are wont to do, with military personnel.
See how servicemen have reacted to not being allowed to say Christmas at the link below:

Ahahhaahahha
Leaving Christianity is going down of the country!
Obama is a fool and needs to be slapped repeatedly
Robert Fletcher What is there safety net to fall back on to go forward?
Hey Obama Merry Christmas! What a$#%&!@*!
Merry Christmas
I’m in the military… I have received no order to “not say Christmas” they even put up decorations every year on base
Oh well, Good thing I’m not still in!!!!! Merry Christmas, you Muslim POS!!!!!
Screw that crackhead
Merry christmas to every single one of you soldiers and I’m sorry the grinch wants to steal it from you.