I totally understand that Koreans are not aware of Christmas customs here, but in Central Europe, we are having a Christmas dinner at ~17:00. It's just sad that many people will miss 3 extra spawns because of that. Moving it to a later time would be better (22:15+ is free slot, but there's a siege. Maybe make it spawn with other world bosses at 00:15? Or in the morning instead)

or make em spawn right after eachother?