During fight week, all media interviews, news conferences and weigh-ins are taking place about five hours later than usual to fit with the fighters’ later sleep patterns.
Britain’s Tom Aspinall, who defends his interim heavyweight title against American Curtis Blaydes in the co-main event, made light out of the situation.
Aspinall has been telling reporters he has been dipping his hands in petrol in the early hours of the morning to harden his knuckles.
When asked if the story was true, Aspinall shakes his head and bursts out laughing.
“I’ve got a lot of Traveller friends and they joke about it all the time, it’s like an old gypsy way of doing stuff,” Aspinall told BBC Sport.
“It’s just a joke – I was hoping just for my Traveller friends to have a giggle because we joke about it all the time.”
Other fighters, like Arnold Allen and Blaydes, meanwhile, have joked that they are sick of being asked about the timings of their fights.
Edwards appears to be the fighter who has prepared his sleep pattern the most and Sullivan says it is this attention to detail which makes him a champion.
“The crazy thing about it is for 80% of the roster this stuff probably doesn’t make a difference, but at the tip of the spear in pound-for-pound contention, every little bit counts,” said Sullivan.
“You need to know you’ve done every little thing possible so it’s your best performance and that’s Leon – his diet, strength and conditioning, technical skills, his sleep, how he manages his relationships, his time with people, everything.
“There’s no 0.1% that’s left unturned and that’s why he’s the champion.”