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:

Is he bringing great shame to people of all colors? Not bringing, it is here. Shaming an entire country before the whole world. Can we get our leadership with dignity back?
Stand up against evil (obama) and stand up FOR JESUS!! Just do it!!
Oh, and hey Obama…
Someone in washington slap the evil out of him
America will not ensure your safety nor security.
OBAMA UR ONE DUMB SUMBITCH
This is not true, geeze
He is an idiot that needs to be impeached
What do you think will happen on Judgemrnt Day?
Will be so glad when he is gone !