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:

Holy s*** really Merry Christmas
This site is blatently spreading another proven lie. All you people eat it up and take what they print without thinking if it’s true or not. Because of your hatred for the President, the poison that you are spewing is causing so much damage and divisiveness in this country. You claim he is hurting America but you should first look in the mirror and see your part in it.
Of course it’s ludicrous, you idiot, it’s not true!
Amazing…reguritated article from 2013 already proven to be inaccurate two years ago and look at these posts. People desire an opportunity to spew venom and hate.
MERRY CHRISTMAS bathhouse BARRY! Wash the$#%&!@*off you lips too!
Not true folks…
Merry Christmas, u worthless muslims!!!
It’s on the internet so must be true!
I think that All Private Citizens SHOULD stand in the Lobby and Say and Sing Merry Christmas songs to all that enter. That is not against the law yet.
He is a dick