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:

I cannot believe obama would stoop this LOW!!!!
How about the military just not listen, like the Egyptian didn’t listen to Mubarak***
When will congress ( that coincidentally also defines a family of baboons) actually stand up to the muslim s o b in the White House? Why are they afraid of him ? What are they hiding ? This is the question of the entire termsof this administration
MERRY CHRISTMAS!!
He is a MUSLIM LIAR AND TRAITOR HURTING THE USA
MERRY CHRISTMAS MILITARY
the first amendment provides all Americans with free speech if they want to say Merry Christmas then they can say it.
Congress is afraid of OFFENDING The first black president who has done nothing for the blacks
That will be a Cold day in Hell. He can write whatever he wants it means nothing if no one follows it. Waste of ink!!.
To bad it’s not up to him