The article says the longest Christmas song is 16.5 mins... not even close. I know, it's just the songs that matched their keywords... but Lindstrøm did a Christmas-cheer-draining 42 minute long version of Little Drummer Boy a few years back https://www.theguardian.com/music/2009/dec/11/lindstrom-litt... - and yes, it's a real thing on vinyl, not just another youtube '10h of jingle bells'.