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:

Another example of the Left attacking Christianity every chance it gets…
Merry Christmas everybody!
Check out snopes.com this is NOT true
Seems he is saying that we have muslims in our military that get offended by the holidays that are holidays because Christmas nothing else.. merry Christmas to all the people around the world.
BS
Think again as*hole!
At my last job we could only say happy holidays
Joseph Mercado
Why is This man still in office
Maggot head,negro