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:

He’s gotta go zzz!
Idiot
You will lose
christmas is christ as in christianity. leaving out buddhism, islam, judaism, sun worshipers, atheists , etc.
Yes I am merry Christmas
Merry Christmas Paul!!!
Nope
And happy thanksgiveing
You guys fight for our once great country you have the right to say whatever you want to so Merry Christmas. Thank you for your service to our country. We the people care not our government.
Every Country has a foundation (border ) and traditions;little by little our traditions are being stripped away.Then the left can rebuild Us into socialism ; confederate flag n Mt McKinley n Yes Happy Holidays