Ethiopian Jewish holiday occurring 50 days after Yom Kippur https://hebcal.com/h/sigd-2023?uc=ical-flower-mound

Start of month of Kislev on the Hebrew calendar. Kislev (כִּסְלֵו) is the 9th month of the Hebrew year, has 30 or 29 days, and corresponds to November or December […]