From 9- 12:30 various rituals and ceremonies at Mundut will be held before lunch.
The pilgrimage from Mundut to Borobudur will start around 1:30pm and they should all have reached Borobudur by 4pm (all in the hottest part of the day!)
From 4- 6pm, each group of monks has time to undertake their own rituals.
Between 6-7pm all monks have to head to the first level of Borobudur.
From 7pm onwards, is the ritual of circumambulating Borobudur clockwise on each level 3 times and then afterwards, releasing paper lanterns.
The ritual of circumambulation is called pradaksina.
Here is what the Encyclopedia Britannica explains pradaksina:
The worshiper, by beginning in the east and keeping the sacred object on his right-hand side, proceeds to the south, thus moving in the direction followed daily by the course of the sun. Pilgrimages sometimes consist of circumambulating an entire town.