Spirits and stars · Auspicious
Read one position back from the month branch: favourable for rest, recuperation and medical treatment.
Take the position one step before the month branch: first month sees Chou, second Yin, third Mao, fourth Chen, fifth Si, sixth Wu, seventh Wei, eighth Shen, ninth You, tenth Xu, eleventh Hai, twelfth Zi.
Source: Xie Ji Bian Fang Shu
In practice it reads as a day suited to the body and to recovery: treatment, recuperation and rest take less out of you.
Used as a chart hint only (it does not enter any score). The rule is implemented from the fixed classical table and asserted by its own guard (check-shensha).
Rule of thumb: these markers are read from fixed classical tables, and the scores and advice come from a separate model. Both are laid out on the site, and neither is a claim about what will happen.
Is treatment more effective on this day?
So the tradition holds, but we make no medical claim. Please follow your doctor.
How is it different from Heavenly Pardon?
Heavenly Doctor is about the body and recovery, Heavenly Pardon about leniency and closing things out.