The ninth day of the Nine Emperor Gods Festival, which is the last day of the festival, is also the birthday (or more correctly the manifestation anniversary) of Dou Mu (斗姆元君), the Mother Goddess of the Nine Emperor Gods.
Prayers specifically to Dou Mu on this day to ask for her blessings are believed to be very efficacious, and temples would usually conduct this prayer today, besides holding the usual events for Nine Emperor Gods Festival such as fire walking or bridge crossing.
Unfortunately this year's festival had been dampened by the Covid-19 pandemic and is very much a non-event in many parts of Malaysia. And as we bid this year's not so happening Nine Emperor Gods Festival goodbye, we can only hope that next year we get to enjoy all the festivities as usual again.