They don't stop after December.   They just keep on calling year round.    A couple of days ago they spoofed the number of the local hospital/  clinic.    I've been ignoring all calls not in my contacts for a month.   Unfortunately,  I answered the one from  "OSF Healthcare" .    They were beginning to dwindle down.   They seem to not bother me when I'm in church on Sunday mornings.  I average over 10 calls per day.  Except on Sundays  only 1 or 2 on the Lord's Day.