And when the day of Pentecost came [Note: This was a Jewish festival held fifty days following the Passover Festival. Lev. 23:15-21], they [i.e., the twelve apostles] were all gathered together in one place [i.e., their second story living quarters, 1:13 ?].

Now some devoted Jews from every nation of the world were visiting Jerusalem [for the Pentecost festival].

When he realized that this act pleased the Jews, he proceeded to have Peter arrested also. [This happened] during the Festival of Unleavened Bread [See Exodus 12:15ff].

So, Peter was arrested and put in jail with four groups of four soldiers each guarding him. Herod planned to have him brought before the people after the Passover Festival was over.

And we [ourselves] sailed away from Philippi after the Festival of Unleavened Bread [Note: This was the Jewish feast commemorating deliverance from Egyptian bondage], and five days later [we] joined them at Troas [i.e., the seven men mentioned in verses