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:

No impeachment!!! Arrest!!!!
Are there really this many people ignorant of what a president can and can’t do? President BO has done so many bad things why do we need to make stuff up about him?
http://www.snopes.com/obama-military-christmas-ban/
Jesus!!!
This can’t be real
if you believe this your an idiot
“You’re”… Why do the morons who do not know how to spell or use punctuation call others idiots? Dumbass
Puke!
Screw you Obama.
Snopes has confirmed that this is false
Then you can’t praise Allah
I haven’t seen this memo