+60M</span> is the number of years between the particular winter solstice and the previous winter solstice that occurred at midnight on a ji&#462; z&#464; day in a ji&#462; z&#464; year, but this was not a lunar conjunction. So the integer k needs to be determined in order for the epoch to coincide with the lunar conjunction. Substituting the general solution <span class="nowrap">N=R<sub>0</sub>+60(M+ka)</span> into the last equation in (3) yields</p><p>TR<sub>0</sub> + 60T(M + ka) = R<sub>2</sub> + Ub,&nbs