Acts 12:4 (KJV) "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."
Acts 12:4 (NKJV) "So when he had arrested him, he put him in prison, and delivered him to four squads of soldiers to keep him, intending to bring him before the people after Passover."
The presence of "Easter" in Acts 12:4 in the KJV is perhaps the best-known and most-discussed "translation error" in KJV-only discussions. Mountains of articles and commentaries have been written on this single word, whether the Greek word "pascha" should be translated as "Easter" or "Passover" in this verse. It is my goal in writing this article to not simply reiterate what is amply found elsewhere, but to provide a fresh perspective by slicing through the rhetoric and simplifying the issue by providing some brief history, clear definitions from scripture and often-ignored facts.
In the late-14th century, when Wycliffe translated the first English New Testament, the English word "Passover" did not even exist yet! In the 29 places1 "pascha" occurs in the New Testament, Wycliffe used "pask" or "paske"2 - a modified version of "pascha" (following the Latin Vulgate word "pascha" which is essentially identical to the Greek word). In Tyndale's 1535 translation, most instances appear as "ester" - the three exceptions are Matt 26:17 (which has "paschall" lamb but is called the "ester" lamb just two verses later), Mark 14:12 ("pascall" lamb and "ester" lamb in the same verse), and John 18:28 ("paschall" lamb). Tyndale translated the NT before translating the OT, and although the church in general at that time (and prior) thought of the Jewish "Passover" and the Christian "Easter" as basically synonyms, Tyndale invented a new English word "Passover" when translating the OT, since "Easter" was somewhat of an anachronism since Christ's crucifixion and resurrection hadn't occurred until the NT. After Tyndale's translation, English translations began using "Passover" more and "Easter" less although it was still common to think of them as referring to the same time. For example, the 1539 Great Bible has "Easter" 15 times, and the 1568 Bishops' Bible (of which the KJV is a revision) only has "Easter" twice (John 11:55 and here in Acts 12:4).
Side note: Luther's German Bible ("the word of God in German" according to many KJV-only supporters) has "Oster" (Easter) and related words in all places, with the exception of Heb 11:28 ("Passa"). Conversely, the Reina-Valera ("the word of God in Spanish") has "Pascua" (Passover) in all 29 places (including Acts 12:4), as well as in Luke 23:54, John 19:31 and John 19:42.
William Tyndale solemnly
demonstrates his new "wrist support" invention, more commonly
known as a "book".
It is my position that "Easter" in Acts 12:4 in the KJV is not an error, if understood that from the early church until relatively recently "Passover" and "Easter" were basically synonyms and used interchangeably. The event referred to in Acts 12:4 is the Jewish week-long feast of unleavened bread (not the Christian commemoration of Christ's resurrection, nor a pagan festival), and to refer to it as "Easter" was common, even though it is no longer so. Where I do think that great error exists is in the KJV-only arguments as to why "Easter" is correct while "Passover" is wrong. Let's look at some of those arguments, comparing to what scripture says:
Most people know "Passover" is a Jewish feast associated with when the angel of the Lord "passed over" the houses of the captive Jews in Egypt (Exodus 12), but many people are fuzzy or confused on the details, so we'll start with a basic, Biblical definition of "Passover".
Lev 23:5-6 (KJV) "In the fourteenth day of the first month at even is the LORD'S passover.  And on the fifteenth day of the same month is the feast of unleavened bread unto the LORD: seven days ye must eat unleavened bread."
Num 28:16-17 (KJV) "And in the fourteenth day of the first month is the passover of the LORD.  And in the fifteenth day of this month is the feast: seven days shall unleavened bread be eaten.
2 Chron 35:17 (KJV) "And the children of Israel that were present kept the passover at that time, and the feast of unleavened bread seven days."
Looking at those verses, it seems pretty clear that "Passover" is the 14th, and the "Feast of Unleavened Bread" starts on the 15th and lasts for 7 days (until the 21st):
Many KJV-only authors and supporters then argue that since Passover preceeds the Feast of Unleavened Bread, then when Herod took Peter (Acts 12:3) right before or during the "days of unleavened bread", then Herod could not have been waiting for "Passover" since it was already past, and thus the correct translation cannot be "Passover" but instead must be "Easter" (and understood a pagan holiday, not the Christian commemoration of Christ's resurrection)3.
KJV-only supporters who use the above line of argumentation need to do a little more study. There are two serious flaws in their thinking. First, they have forgotten that although for non-Jews days start and end at midnight, for Jews days start and end at sundown. This is crucial! Yes, the 14th is "the Passover" because that's when the Passover Lamb is sacrificed, but it is not until later that night that the Passover Feast (the eating of the lamb) takes place - in other words, the Passover Sacrifice is at the end of the 14th while the Passover Feast is on the beginning of the 15th:
Exodus 12:8 (KJV) "And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it."
Deut 16:6b-7 (KJV) "there thou shalt sacrifice the passover at even, at the going down of the sun, at the season that thou camest forth out of Egypt.  And thou shalt roast and eat it in the place which the LORD thy God shall choose: and thou shalt turn in the morning, and go unto thy tents." (the sacrifice takes place as the sun is going down (the afternoon, as the day is ending), then it is roasted and eaten later in the evening (when the new day has started))
As such, we now see there are at least two days associated with "Passover" in scripture. The 14th (the "Day of Preparation") when the Passover Lamb is sacrificed, and the 15th when it is eaten. Both appear to be the same "day" to us (for we think of days as ending Midnight), but on the Jewish calendar, it is two different days: the preparation/sacrifice day and the feast day.
The second flaw in the above KJV-only line of argumentation flows from the first. Because of forgetting that to the Jews, a "day" starts and ends at sundown, it is erroneously believed that the feast happens on the same day as the sacrifice and thus it is then claimed that "Passover" can only refer to the 14th and cannot be applied to the entire time in general4 - for if could be shown that the entire week could also be referred to as "Passover", their arguments fall flat. Since we see from the above information that the Passover Feast happens on the 15th, and the "Feast of Unleavened Bread" is on the 15th, it becomes clear that these "two" feast are one in the same! The Passover Feast is the feast on the 15th, and starts the week-long "feast" of eating unleavened bread. Does scripture confirm this, by ever using the term "Passover" to apply to the "Feast of Unleavened Bread"? It sure does!
Eze 45:21 (KJV) "In the first month, in the fourteenth day of the month, ye shall have the passover, a feast of seven days; unleavened bread shall be eaten."
Luke 22:1 (KJV) "Now the feast of unleavened bread drew nigh, which is called the Passover."
We now see that "Passover" can mean only the day of the 14th, the event of sacrificing and eating spanning the 14th and 15th, or even the entire week of unleavened bread which starts with the sacrifice and meal. So when we read in Acts 12:4 that Herod captured Peter during the "days of unleavened bread" and wanted to wait until after "pascha" to deal with him (to please the Jews, by not having a man killed during the week-long holiday), we see that translating "pascha" as "Passover" is correct, and the KJV-only arguments as to why "Passover" is wrong are based on faulty premises and misunderstanding of both Scripture and the Jewish calendar.
In my main comments above, I explained why "Passover" is a correct translation "pascha" in Acts 12:4. However, I did not address the common secondary argument common in KJV-only discussions of this verse. I will briefly address it here:
"Easter comes from the ancient pagan festival of Astarte/Ishtar, and Herod as a pagan was waiting for that event."
There are several problems with this argument: