Clouds conceiving during the bright half will be delivered during the dark half of a lunar month and clouds conceiving during the dark half will be delivered during the bright half. Also clouds conceiving during the day will be delivered at night and clouds conceiving at night will be delivered during the day; also clouds conceiving in the twilight of the morning will be delivered in the twilight of the evening and clouds conceiving in the twilight of the evening will be delivered in the twilight of the morning.