I also notice some kind of cycling going on when I was experiencing my psychotic episodes when I was younger. Several times they seem to come about roughly the same time each year. My old friend's book or website had a study that found a correlation between episodes happening at a certain time of the year. I have been trying to find that study again at his website and will post a link here if successful.

http://schizophreniathebeardedladydi...riodicity.html