The “holy conventions” were scheduled as follows: (1) Every Sabbath (Le 23:3);

On the weekly Sabbath day, the people met together for public worship and instruction. They were then edified by the public reading and explanation of God’s written Word, as in the later synagogues. (Ac 15:21) Therefore, while the people did not do laborious work during the Sabbath day or the other “holy conventions,” they would then devote themselves to prayer and meditation on the Creator and his purposes.​—See ASSEMBLY.