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:

http://www.snopes.com/obama-military-christmas-ban/
From one Marine to all my fellow service members Merry Christmas
Total B.S. As usual. And we wonder why people are shooting up medical clinics.
Doesn’t matter it will all change when he is gone !!!!
Tell him to stick a piece of bacon in his mouth and choke on it
Merry Christmas
When is someone going to come out with “slap a liberal day”?
I see so many of these unbelievable posts, can all of them not be true. This is so weird for a POTUS to do.
False Never happened per snopes.com
merry christmas, happy new year and hope you trim an awesome CHRISTMAAS TREE!