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:

Mr Obama we do not have to abide by anything you write or say. This is a free country.
Rediculas
^^^Amanda Marie Lampe
Absolutely insane. He needs a mental institution. Please insure he gets what he deserves. I don’t need to go further than that.
This is silly.
DEFY IT SOLDIERS, You do not discard your constitutional rights when you serve, the opposite, you are serving to preserve our constitutional rights, including yours!
fxxk him and the goat he rode in on.
GO TO HELL Obummer, —-MERRY CHRISTMAS EVERYONE,
No way!!!!!
https://www.youtube.com/watch?v=XKGdkqfBICw