rm J1 always being in month 1. This is a very strange rule as it clearly doesn't fit the data. I am able to reproduce his Table 10 using the intercalation rule mentioned in Section 3.9 of the book <i>Ancient Chinese Calendars and Almanacs</i><sup><a href="QinHanCalendars.html#ZCBH2008">ZCBH08</a></sup>. The rule is to require the winter solstice to be in month 11 for the years before <span class="nowrap">N<sub>-162</sub></span>, and to require the solar term Z1 to be in month 1 for the years after <span cla