Feasts of Demeter & Persephone

I really and truly didn't realize how many actual festivals there were for Demeter. I would also like to point out the the Minor Eleusinian Mysteries start in 2 days for any of you interested in working with Demeter & Persephone. I personally marked them all on my calendar and have the intention of doing something for each of the days, if nothing but a small invocation and trying to think of the energies associated with that day.