Chinese calendar celestial stem indicating device, has movable disk with months and dates of month, where month and year are mapped by rotation of disk such that celestial stems of days are read against date of month

摘要

The device has a main disk divided into 10 sectors where celestial stems of days (9) and a series of years (7) are written. Months (6) and the dates of the month (8) are written in a secondary movable disk. A month and a year are mapped by rotation of the disk with respect to a main disk by a central assembly such that the celestial stems of the days are read against the date of the month.