Day Master

The Day Master establishes the chart’s reference point. Other stems become Wealth, Officer, Resource or Output relative to it. Strong and weak describe seasonal support, roots and generation relative to controlling or draining influences, not physical strength, willpower or personal worth. This reference prevents mixing Ten God labels across charts.

Each of the Year, Month, Day and Hour Pillars has a stem and a branch. The Day Pillar’s stem is the Day Master, also called Ri Gan or Ri Yuan. Yuan Hai Zi Ping uses it to assign Ten Gods by element relationship and polarity. Day Master refers to one stem; Day Pillar refers to the whole pair.

On a Jia-Zi day, Jia wood is the Day Master and Zi is the Day Branch. Geng is Seven Killings for Jia but Direct Officer for Yi because the polarity relationship changes. Identify the Day Stem first, then label other visible stems and the stems hidden in branches.

Compare rooted Jia in a Yin/Mao month with Jia facing abundant metal in a Shen/You month. The former invites examination of concentrated wood and Fire output; the latter of Metal control and Water or Wood support. The Day Master is unchanged, but its setting differs.

Compatibility also reverses the reference: Jia sees Ji as Direct Wealth, while Ji sees Jia as Direct Officer. State whose perspective is being used instead of treating a Ten God as one person’s fixed identity.