Moses said: "Your tryst is the Day of the Festival,(2583) and let the people be assembled when the sun is well up."
2583 A great day of a Temple Festival , when the temples and streets were decorated, and people were on holiday, free from work (Cf. 26:38). Moses makes this appointment in order to collect as large a number Possible, for his first duty is to preach the Truth. And he apparently did it with some effect with some Egyptians (20:70, 72-76), though the Pharaoh and his high and mighty officers rejected the Truth and afterwards Paid the Penalty.