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:

President Obama you cannot take our First Amendment rights away with your pen
F U Obumer
I would say it every chance I had and see what would happen. We do have a right to free speech.
Still America this$#%&!@*can’t stop no one from saying MERRY CHRISTMAS.
MERRY CHRISTMAS to all the Military! God Bless you all this year and I apologize your missions are diluted with false OBAMA horse c**p!! Soon enough we can kick this Obama administration to the curb!!!
That crossed my mind to, especially the domestic enemy.
That Muslim S.O.B.
Merry Christmas and God bless our Military. Obama F you and your piece of paper..
Thank the millions of ignorant, illegals & communist, some of which have slithered their way into this Country and to those for voting is POS into office! The “I;m too busy to worry” have ONLY themselves to blame for the state of this Country now! obama has LOADED every KEY office he can with a muslim or communist, it will take YEARS for someone honest to come into office and rid the Country of this Cancer, hopefully, before it’s too late!
Impeach this Traitor!