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:

How embarrassing is this man….Merry Christmas ALL ARMY, NAVY, AIR FORCE, MARINE and COAST GUARD personnel everywhere.
F××× the towel headed goat humper
I don’t believe that for a second
Gloria it will not fly we will never give u we our first amendment
Does the military not have freedom of speech?
Merry Christmas to everyone
Tell him to go to hell
Obama’s laws are no good,he doesn’t have a law licemse
Big surprise.
Obama works for the Devil whom he worship.