ior Epoch</sect><subsect id="description">General Description</subsect><p>According to Q&#363; &#256;nj&#299;ng, the ancient method of computing the superior epoch can be divided into a few steps. First, choose an integer A to represent the denominator of the synodic month <span class="nowrap">P<sub>L</sub></span>. That is, write <span class="nowrap">P<sub>L</sub></span> = <span class="nowrap">U/A</span> days, where U is another integer. The tropical year <span class="nowrap">P<sub>s</sub></span> (in days) 