Back in the days of vacuum tubes, smoking in the control rooms and vinyl records, being an eighteen year old dj at your favorite local AM rocker involved inserting Christmas songs into the song rotations. The PD or station manager usually sent out a mimeographed notice the week after Thanksgiving giving us instructions as how often we should insert a Christmas song between the Top 40 survey records. By one week before Christmas, I believe we were up to four Christmas songs per hour, two every half hour. A song, A song, B song, insert. By the time Christmas Eve came around, we were pretty heavy in the Christmas rotation. Christmas Eve 18:00 - 12:00 Christmas day was pretty much all Christmas music with A songs thrown in. After 12:00 we pretty much went back into format. Memories of working 12 hr shifts at the board, no commercial spots, plenty of PSA's and bad coffee.