One more reasoning for Acts 12:3-4 in addition to the followings which were posted before is that After the Crucifixion of Jesus and His
Resurrection, the fever and passion for the feast of Passover has diminished, because Jesus Himself has become our Passover:
Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us (1 Cor 5:7)
WHY PASCA is mentioned as TAKING PLACE AFTER UNLEAVENED BREAD DAYS?
Acts 12:3 Then were the days of Unleavened Bread.
Acts 12:4 Intending after Pasca (Passover) to bring him forth to the people.
Acts 12:6 When Herod would have brought him forth, the same night Peter was sleeping.
( Is this after Passover but during Days of Unleavened Bread?)
Acts 12:17 Peter departed to other place.(after Passover but during Days of Unleavened Bread?)
Acts 12: 20 Herod commanded that they should be put to death. (Execution during Days of Unleavened Bread?)
My study shows (as you could see in the sites which I mentioned) that:
1 ) Ishtar took place 1 day after Pesach, Pesach 14th of Abib month, Ishtar 15th of the same month. Ishtar lasted 8 days as well. .
2) Ishtar was much more popular throughout the Middle East world, while Pesach was celebrated by religious people of Israel.
3) Kings believed that Ishtar had the authority to appoint the kings and to dismiss them, and therefore Herod would have paid very much attention to it.
4) Even King Solomon worshipped Ishtar and didn't care about the Passover, but King Herod was more faithful with Passover? (1 Kings 11:5)
5) Days of Unleavened Bread had the focus on the first day, Passover, then I believe that Ishtar had the focus on the Sunday(Sunrise) and on the final day, as a finale, with a lot of Orgies
6) Both Pesach and Ishtar festival were called Pascha in Aramaic and I can imagine nobody would have called it as Ishtar because it was holy to them.
7) Then it was re-translated as PASXA in Greek.
Peopl can see on this board how much some people who call themselves as Christians are eager to worship Easter the pagan goddess, while confessing the faith in Jesus with lips .