Reply To: when do we start saying vsan tal umatar this year

The current calendar isn’t a perfectly good one. I don’t know all the calculations, but Bircas Hachamo is a real problem. There are two calculations for the tekufah (Shmuel and Rav Adda), and the one which is used for calculating leap years is not the same as is used for bircas hachamo. Hence, birkas hachamo next time, 8 April 2037 is AFTER Pesach, even though it is the day of the tekufa, and pesach should be before the tekufa. Basically, the secular calendar is sliding forward slowly, by 3 days every 400 years.