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:

Correction none of us will be around to say ” Christmas
Merry Christmas you whimp
Tell that Oger to kiss your MERRY CHRISTMAS OBAMA!!!!!!
Impeach Barack$#%&!@*Obama now before he can kill anymore of America.
Stupid Muslim!
Bite me !
This is not legal and therefore not binding!
Screw obamooslime , everybody is entitled to the right of free speech !
I would tell him to f off….. he is sick.
Completely unconstitutional. Say Merry Christmas proudly!