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:

Well back a few years ago the Military was ordered by Bill Clinton to NOT talk about the stained blue dress incident but we did. So good luck with that Barry.
Disgrace after disgrace
What happened to 1st amendment guarantee of free speech?
poo on you
what will be the punishment? shot, or band from the earth
Nice
People we are in big trouble.
What!!
we were here first it should remain christmass yourc wrong
Merry Christmas to all those in the military. At least we still have free speech!