It is midnight, 3 more hours till the sun rises. You need to keep muzan kibutsuji in the sun so you can burn him. The hashira and demon slayers are battleing well he is holding back.

Sanemi: GIYU! QUICK! STRIKE HIM DOWN!

gyomei: HE HAS NINE HEARTS AND EIGHT BRAINS! WE WON'T KILL HIM IN WE DECAPITATE HIM! SO WE MUST BURN HIM!

zanitcu: unconscious

Obanai and mitsuri: saying their last goodbye to each other

Muzan: attacking everyone