year <span class="nowrap">y-1</span>, all other 23 solar terms computed using equation (2) are in year y.</p>
    
<p>The times of lunar conjunctions can be written in the form as in equation (1) on the <a href="guliuli.html#computation">ancient six calendars page</a>:<br />
JD(M<sub>i</sub>) = JD(M<sub>0</sub>) + i&middot; P<sub>L</sub>&nbsp;&nbsp;&nbsp;&nbsp;(3)<br />
Here P<sub>L</sub> = 29 + 499/940 is the number of days in a lunar cycle in the <i>s&#236;f&#275;n</i> system, i is the lunation number fro