When Radio Stations Switch to Christmas Music
The classic pattern is the post-Halloween flip. Once October 31 passes, a wave of stations across the US drops their format and goes all-Christmas, all-day. Many make a public event of the exact moment, because being the first station playing carols is a reliable way to win November listeners.
Not every station moves at once. Some wait until mid November, and a smaller number hold out until the day after Thanksgiving, the more traditional start of the holiday stretch. By the last week of November, though, nearly all of them have made the switch.