Reply To: Can a RY declare a Yeshiva wide fast? Home › Forums › Bais Medrash › Minhagim › Can a RY declare a Yeshiva wide fast? › Reply To: Can a RY declare a Yeshiva wide fast? April 9, 2019 9:11 am at 9:11 am #1711928 rationalParticipant Of course, it’s a no-brainer. My Rosh yeshiva did it.