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:

Bull put a gag order his executive cent less orders
Why can’t you say Christmas? Even I don’t agree with this Santa thing
This story is ridiculous and FALSE. Look it up.
This is false.
Jason Lichniak
Merry Christmas for the troops and f*ck obama. Trump 2016.
http://www.snopes.com/obama-military-christmas-ban/
What???
Wtf?
Americans have lost any sense of freedom.We have been programmed to question all forms of FAITH.A short time ago the word FAITH was uplifting,joyful.FAITH represented hope,one could hold onto FAITH thru their hard times.The notion of POLITICALLY CORRECTNESS,has snuck in like a snake,used by our leaders like shepherds of mindless sheep.