Easter in Acts 12:4 of the King James Bible is not a contradiction

Acts 12:1-4
12 Now about that time Herod the king stretched forth his hands to vex certain of the church.

2 And he killed James the brother of John with the sword.

3 And because he saw it pleased the Jews, he proceeded further to take Peter also. (Then were the days of unleavened bread.)

4 And when he had apprehended him, he put him in prison, and delivered him to four quaternions of soldiers to keep him; intending after Easter to bring him forth to the people.

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https://youtu.be/xWbmq5k6D9E?si=rm9J04-1jI_zIhuz