40,000 yojanas is also the height at which the Sun and Moon circle Sumeru in a clockwise direction. This rotation explains the alteration of day and night; when the Sun is north of Sumeru, the shadow of the mountain is cast over the continent of Jambudvīpa, and it is night there; at the same time it is noon in the opposing northern continent of Uttarakuru, dawn in the eastern continent of Pūrvavideha, and dusk in the western continent of Aparagodānīya. Half a day later, when the Sun has moved to the south, it is noon in Jambudvīpa, dusk in Pūrvavideha, dawn in Aparagodānīya, and midnight in Uttarakuru.