One more thing on this. By the parameters of the 3663y luni-solar cycle, which is 111 33y cycles, the mean year of the 11-year luni-solar cycle evidently drifts through the seasons every 2664 years.
Therefore
= 1 drift cycle
= 2664 solar years
= 2665 luni-solar years ( 11y-cycle )
I have now made a web-page for the IM calender
http://www.helios.netne.net/ivymike.htm