He might not see you when you’re sleeping or know when you’re awake, but he does have of a surefire remedy for holiday spirits in need of lifting.

Dr. Christmas — aka UW Oshkosh sociology professor Gerry Grzyb — will present his 19th annual radio show from 1 to 6 p.m. Dec. 18 to 24 on WRST-FM and at www.uwosh.edu/wrst. Billed as the most musically diverse Christmas music show anywhere, it will feature new recordings — from chamber choirs, jazz combos and crooners to doo-wop groups, heavy metal bands and a marimba ensemble.

“Every year, I wonder if I’ll have anything really new to play, but this year certainly is no disappointment,” said Grzyb. “Or have you already heard ‘Silent Night’ sung in Navajo and ‘What Child is This?” mashed up with Led Zeppelin’s ‘Baby, I’m Gonna Leave You?’”

The Dr. Christmas Radio Show also will include readings from a new book “Christmas in Minnesota” and a giveaway of more than 100 new CDs — for those who made it onto the Nice List, of course. Thousands of listeners are expected to tune in.

Dr. Christmas will conclude his seasonal duties by broadcast a recording of the Dec. 15 Oshkosh Chamber Singers’ “Lessons and Carols” concert at 4 p.m. Dec. 22.