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:

Sorry MERRY CHRISTMAS
How much longer till he is impeached????
Sorry obummer. F u and MERRY CHRISTMAS
VOTE TRUMP PEOPLE!!!!!
I thought this country was free!!! Freedom of religion and if people in the military are Christians then they have the right to say Christmas
he has proved to this country many times he doesn’t have any interest in doing his job and has did several things against our constitution to prove this and we still see him in office why is this and now you are letting him take our tribute to Christ on his birthday we have seen his so called evil but nothing concrete yet it is a great scam and it will go down in history as such but its up to us if it reads a successful scam or failed scam people
he needs fired
When the hell did we agree to have a DICKtator in the Whitehouse.
Merry Christmas everyone!!! Shutup Obama!!
If The sergeant of arms would do his job and arrest Obama for treason The military then could enjoy their Christmas and have a happy new year to get rid of that$#%&!@*obama