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:

Tell Obama to go to hell!!!!!!!!!!!!!!!!!!!!!!!!!!1
As a Veteran f’ck him
I think P.C. needs to be pounded where the sun don’t shine!
He needs to leave the holiday alone
F—k him!!!
I meant it sarcastically betty holland
Time to send in the Rednecks!
Obama is pushing his luck. He can never take CHRISTMAS OUT OF HEART OR OUR MOUTH.
Say it anyway.
Obama is a lil Muslim child trapped in a black mans body