Terach roll call
to explain: there is a term used by some, “Terach minyan”. Terach was Abraham‘a father. Abraham introduced Shachris, the Jewish morning prayer, which optimally should be said after sunrise. When people need to pray before sunrise, the slang term is Terach’s minyan, because he was “earlier” than Avrohom.
I borrowed that slang to call a roll call before the mandated 1:00 start time.