If you go to Wikipedia and look up 'Do You Hear What I Hear?' you will see it stated as fact that it was recorded on the day of President John F. Kennedy's assassination.

For those with short memories I note that took place on 22 November 1963.

Now, apart from the fact that such a recording date is possibly a little late to catch the Christmas market, and organise any suitable pre sale publicity,  that Bing was busy filming Robin and The 7 Hoods on that day with Frank Sinatra, we have the Capitol recording logs which show -

BING CROSBY:
Bing Crosby(vo) with Ralph Carmichael Orchestra and Chorus.

(Session #11534) LA,October 21,1963

50737-1 Christmas dinner country style Cap.5088
50738-5 Do you hear what I hear? - STBB 2979,SM-11834

CD Cap.7-94701-2,7-97458-2

Both titles also issued on Cap.6276,T/ST 2176,Y2T-2405,(Eu)3C054-86009,CD Cap(J)TOCJ-5946.

All of this fits in nicely with the master numbers for 'Bing Sings The Great Country Hits' a few days later.

So don't believe everything you see. I suppose it is just possible that this might have been an issue date - but we have the authority of of Fred Reynolds, who states that the single with 'Christmas Dinner Country Style' was issued five days after recording - on 26 October 1963.

For those interested I will not touch the Wiki entry for a few days, but do intend to edit it unless someone else gets in first.

The entry was pointed out to me by John Rose of station WZZY (The Christmas Station), Winchester, IN

who intends a play of the song and mention of the error.