Who Changed the Calendar?

Yah’s Appointed Times, Christian Tradition, and the Feasts of the Coming Kingdom

Michael Antonio Jeter

The Apostolic Record

Christianity possesses a religious calendar. Christmas commemorates the birth of Christ. Easter commemorates his resurrection. Good Friday commemorates his execution. Other observances developed across Christian history, while secular holidays such as Thanksgiving, New Year’s Day, Valentine’s Day, and Halloween became intertwined to varying degrees with the lives of Christian communities. The Bible also possesses a religious calendar, but it is not the same calendar.

That difference raises a question more fundamental than the familiar debates over Christmas trees, Easter eggs, December 25, pagan festivals, or the etymology of the word Easter: Who determines how Yah is to be worshiped? If the answer is Yah, then the biblical record presents Christianity with a question that cannot be resolved merely by appealing to centuries of tradition. Where did Yah abolish the appointed times He established and authorize another religious calendar in their place?

The question becomes more difficult when Scripture is followed chronologically. Yah establishes His appointed times in Torah. Yahshua lives and teaches within that sacred calendar. The apostolic writings continue to speak in its language. The Prophets, looking beyond the present age, describe Yah’s appointed worship in the world yet to come. Somewhere between the apostolic assembly and later Christianity, however, the religious calendar changes. The historical fact that Christianity eventually developed a substantially different liturgical calendar is not in dispute. The theological question is whether Scripture authorized the change.

Yah’s Appointed Times

Leviticus 23 must therefore stand at the beginning of the inquiry. Yah instructs Moses to speak to the children of Israel concerning His mo'edim—His appointed times. The chapter identifies them not merely as Israel’s festivals but as the appointed times of Yah, sacred convocations to be proclaimed at the times He established. Sabbath, Passover, Unleavened Bread, Firstfruits, Weeks, Trumpets, the Day of Atonement, and Booths or Tabernacles are placed within a calendar whose authority originates with Yah Himself.

That possessive language matters. Scripture does not initially introduce these observances as Jewish inventions. Moses does not claim authorship of them, and Israel does not create them by religious custom. Israel is commanded to observe them, and they become inseparable from Israel’s national and covenantal life, but their authority does not originate with Israel. They belong to the One who appointed them. Calling them merely “Jewish holidays” can therefore obscure the more fundamental biblical claim: they are Yah’s appointed times.

The principle is larger than any individual feast. The worshiper does not possess independent authority to decide what Yah will call holy. Torah repeatedly demonstrates that sincerity alone cannot sanctify an unauthorized form of worship. The question is therefore not first whether an observance is emotionally meaningful, celebrates something true, promotes family unity, or invokes the name of God. The prior question is whether Yah appointed it.

This is precisely why the argument should not begin with pagan origins. Even if every disputed claim about pagan influence upon later Christian holidays were removed, the jurisdictional question would remain. A religious observance does not become an appointed time of Yah merely because the worshiper attaches Yah’s name to it. Before asking where Christmas, Easter, or any other later observance came from, Scripture requires us to ask what Yah Himself established.

Yahshua, the Apostles, and the Claim of Abolition

The arrival of Yahshua does not produce the religious calendar familiar to modern Christianity. There is no command from him to commemorate his birth annually, no institution of December 25 as a holy day, and no instruction establishing the later Christian festival cycle. Nor does he detach his death and resurrection from the Passover world in which those events occur. Instead, the Gospels place Yahshua squarely within the scriptural calendar. John 7, for example, is framed by the Feast of Booths: the feast approaches, his brothers go up, Yahshua subsequently goes, and during the feast he enters the Temple and teaches. The appointed time is part of the world in which his ministry unfolds.

This reverses the way the issue is commonly framed. Christians are often asked whether they should begin observing “Jewish festivals,” as though the later Christian calendar were the original norm and the biblical calendar were a foreign addition. Historically and textually, the prior question is the opposite: when did followers of Israel’s Messiah cease recognizing the appointed times found in Israel’s Scriptures? Yahshua did not enter history carrying Christmas, Easter, or a later ecclesiastical calendar. He entered the covenantal world established in Torah. If he abolished that calendar, the evidence should be identifiable. If he replaced it, the replacement should be identifiable.

There is also a question of jurisdiction. Yahshua repeatedly presents himself as the one sent by the Father, whose teaching and mission are governed by the will of the One who sent him. Consequently, the assertion that Yahshua abolished commandments established by Yah cannot simply be presumed; it must be demonstrated from his teaching. Where does he declare that the appointed times established by his Father have ceased to be Yah’s appointed times? Where does he institute a different sacred calendar in their place? The burden becomes greater when the proposed replacements appear nowhere in his instructions.

The same burden follows into the apostolic writings. The apostles certainly interpret Israel’s Scriptures through the Messiah. Passover acquires profound messianic significance; Firstfruits becomes resurrection imagery; Pentecost is inseparable from the events of Acts 2. Yet interpretation is not abolition, and fulfillment is not automatically cancellation. To explain what an appointed time signifies in relation to the Messiah does not by itself establish that Yah revoked the appointed time, still less that He authorized the creation of another observance to replace it.

Paul’s letters are therefore indispensable to the inquiry, because Romans 14:5–6, Galatians 4:9–11, and Colossians 2:16–17 are regularly invoked as evidence that the biblical calendar ceased to govern the life of believers. Those passages deserve serious exegesis; they should neither be dismissed nor insulated from scrutiny. But they also should not be made to say more than they say. Paul does not write, “Yah has abolished His appointed times.” He does not command the assembly to replace them with new annual holy days. He does not establish December 25, institute an annual Easter Sunday, or delegate to a developing ecclesiastical hierarchy the authority to construct a replacement sacred calendar.

Colossians is particularly revealing because Paul warns his audience not to permit others to judge them concerning food, drink, a festival, a new moon, or Sabbaths, describing these things as a shadow in relation to the Messiah. Whatever conclusion one reaches about the precise force of that passage, a shadow is not a falsehood; it corresponds to something real. Nor does identifying the Messiah as the substance establish, without further argument, that the appointed time becomes sinful, meaningless, or forbidden. Most importantly for the present question, the passage institutes no replacement calendar. Even if one interprets Paul as making observance optional, optional is not replacement.

We are therefore left with a surprisingly simple evidentiary problem. Yah’s appointed times are expressly instituted. Where is the instrument of repeal? If Passover ceased to be an appointed time of Yah, where does Yah say so? If Unleavened Bread, Shavuot, Trumpets, the Day of Atonement, or Sukkot ceased, where is the declaration? And after producing that evidence, another question remains: where is the instrument establishing their replacements?

When the Calendar Changed

At this point history becomes relevant, but history must be used for the right purpose. It can show that Christian practice changed; it cannot by itself prove that Yah authorized the change. Early Christianity did not immediately possess the completely standardized calendar familiar to later centuries. The Paschal controversy provides a clear example. Some Christian communities commemorated the Passion according to the fourteenth day of the lunar month associated with Passover, while others centered the observance upon Sunday. Scholarly histories of the Easter computus document this diversity and the later drive toward calendrical uniformity, particularly in the Constantinian and Nicene period.

The point is not that the Council of Nicaea simply invented Easter; such a claim would be historically careless. The point is that the historical record reveals a process by which calendrical uniformity developed and ecclesiastical authority increasingly determined the form and timing of Christian observance. The later Christian liturgical year did not descend intact from the apostolic age. It emerged historically. That distinction matters because institutional power and scriptural jurisdiction are not the same thing. A bishop may introduce an observance, a council may standardize it, an emperor may encourage uniformity, and generations may inherit the resulting tradition until its historical development is largely forgotten. None of those facts demonstrates that Yah delegated the authority to alter His appointed times.

The origin of December 25 illustrates why this argument does not need to depend upon simplistic pagan-origin claims. Scholars continue to debate why that date became associated with the birth of Christ, and the so-called calculation theory remains a serious scholarly explanation, proposing that Christian chronological reasoning could have produced the date without requiring direct borrowing from a pagan festival. Let that possibility be granted. Suppose December 25 had no pagan derivation whatsoever. The fundamental question would remain unchanged: where did Yah appoint it? Historical innocence is not divine authorization.

The same methodological discipline should govern the entire inquiry. Questions about Saturnalia, solar religion, Easter customs, eggs, rabbits, trees, and other possible survivals or adaptations from surrounding cultures are legitimate historical questions, but they are secondary. Christianity’s first obligation is not to prove that its later holidays are free from pagan influence. It is to establish the authority by which a different sacred calendar came to occupy the place that Yah’s appointed times occupied in Scripture.

The Prophetic Problem

The argument becomes considerably more difficult for the abolition position when the Prophets are allowed to speak about the future. If the biblical record ended with the apostolic writings, Christians might continue debating indefinitely whether Paul intended the appointed times to disappear. But the Prophets look beyond the present age, and what they describe does not resemble a world in which Yah’s appointed order has vanished from His purposes.

Isaiah closes with a vision associated with the new heavens and the new earth in which worship continues to be expressed from New Moon to New Moon and from Sabbath to Sabbath, with “all flesh” coming before Yah. Ezekiel’s restoration vision likewise retains calendrical markers that are unmistakably connected to the biblical festival order: the first month, the fourteenth day, Passover, Unleavened Bread, and a feast in the seventh month. Whatever interpretive questions surround Ezekiel’s temple vision, the calendar he depicts is not Christmas, Easter, or the later ecclesiastical year. It is recognizably rooted in the appointed order of Scripture.

Zechariah 14 makes the difficulty even sharper. The prophet portrays surviving nations going up year after year to Jerusalem to worship the King, Yah of hosts, and explicitly identifies the Feast of Booths as part of that future worship. Sukkot therefore serves as a particularly clear witness, not because this article is about Sukkot alone, but because Scripture itself carries that appointed feast forward into the reign to come.

This is also where the distinction between commemoration in exile and restoration becomes necessary. Recognizing the continuing significance of Yah’s appointed times does not require pretending that the present dispersion is the restored Kingdom. Torah connects important dimensions of the pilgrimage festivals to Israel’s land, agricultural cycle, sanctuary, priesthood, sacrifices, and the place Yah chooses. Israel scattered among the nations cannot manufacture the Temple, restore the Levitical priesthood, recreate the national agricultural order, or designate a substitute Jerusalem wherever Israelites happen to reside. Exile changes the circumstances under which certain commandments can be carried out; it does not, by itself, constitute their repeal.

Sukkot illustrates the distinction. Some congregations voluntarily erect tents or booths as a commemorative practice, but constructing a temporary shelter in the diaspora does not recreate biblical Israel. Israel can remember and commemorate what Yah commanded without pretending that exile is restoration. Zechariah’s prophecy actually reinforces the distinction, because it depicts something the diaspora cannot presently reproduce: nations going up to Jerusalem under the reign of the King to observe the Feast of Booths. The restoration does not prove that exile never occurred; it demonstrates that exile did not possess the authority to erase what Yah appointed.

Placed in chronological sequence, the problem is difficult to avoid. Torah establishes Yah’s appointed times. Yahshua lives and teaches within that calendar. The apostolic writings continue to use its language and interpret its meaning through the Messiah.

Later Christianity develops a substantially different religious calendar. Then prophetic descriptions of the coming worship of Yah again contain Sabbath, New Moon, Passover, the seventh-month festival order, and explicitly Sukkot. The obvious question is not merely what changed, but by whose authority the intervening change occurred.

If Yah’s appointed times were abolished after the apostles but are present again in the coming Kingdom, Christianity must account for the missing interval. Did Yah command the feasts, abolish them, authorize the church to substitute different observances for centuries, and then restore the original appointed order under the reign of the Messiah? If that is the biblical sequence, where is it revealed? Scripture contains no prophecy of the nations assembling under the Messiah to celebrate Christmas. It contains no future command for Easter, Halloween, Valentine’s Day, or the modern Christianized New Year. Yet the prophetic record explicitly preserves Yah’s appointed worship. That fact must be reconciled with the claim that the appointed times were permanently abolished.

Fulfillment, Continuity, and Authority

Christian theology often answers the entire question with one word: fulfilled. The Messiah fulfilled the Law; the feasts pointed toward him; therefore, it is argued, Christians no longer need them. Yet the conclusion exceeds the premise unless additional textual evidence is supplied. If Passover points toward the Messiah, the Messiah gives Passover greater meaning, not less. If Firstfruits illuminates resurrection, fulfillment establishes the significance of the appointed time. If Yah’s appointed times reveal aspects of His redemptive plan, their correspondence with redemptive events vindicates the calendar rather than exposing it as meaningless.

A blueprint does not become false because the building appears, a prophecy does not become worthless because the event occurs, and a shadow is not an enemy of the body that casts it. More importantly, the Prophets prevent fulfillment from being used casually as a synonym for permanent disappearance. If Yah’s appointed worship appears in descriptions of the future reign, then whatever theological meaning fulfillment carries, it cannot simply mean that the appointed order has been erased from Yah’s purposes.

This brings the inquiry back to authority. The usual debate over Christian holidays begins too late when it begins with paganism. Was December 25 connected to Roman solar religion? Did Easter absorb pre-Christian customs? What do eggs, rabbits, trees, or other customs mean? Those questions may be historically important, but Christianity faces a prior question even if every disputed pagan-origin claim were disproved tomorrow. Suppose Christmas were demonstrated to be entirely Christian in origin. Suppose Easter acquired every one of its later customs without borrowing anything from surrounding religions. Suppose every allegation of pagan influence were removed. The question would remain: did Yah appoint them?

Beside those later observances stands another calendar—one Yah unquestionably did appoint. It begins in Torah, remains visible in the life of Yahshua, remains present in the apostolic world, and appears again when the Prophets describe the nations worshiping Yah in the age to come. Those who honor Yah’s appointed times do not first need to establish where those times came from; Leviticus already answers that. The burden falls upon the claim that they were abolished and replaced.

If Yah changed His appointed times, the command should be produced. If Yahshua changed them, his teaching should be produced. If the apostles changed them, their decree should be produced. If Paul abolished them, the abolition should be demonstrated from his words without inserting a replacement calendar he never names. If the patristic church possessed jurisdiction to establish different sacred days, the delegation of that authority should be identifiable in Scripture. And if Yah’s appointed worship truly disappeared from His purposes, the prophetic descriptions of its future presence must be explained.

These are not questions of sentiment, denominational loyalty, or inherited custom. They are questions of text, authority, and jurisdiction. Centuries of observance can demonstrate the endurance of a tradition; they cannot, by themselves, transform human tradition into a command from Yah. The decisive issue is therefore not whether later Christianity possessed the institutional power to change the calendar. History shows that Christian calendars did change. The decisive issue is whether anyone possessed the divine authority to do so.

That leaves Christianity with two questions it cannot answer merely by appealing to tradition: Who changed the calendar—and who gave them the authority to do it?

Selected Sources

Scripture: Leviticus 23; Deuteronomy 16:15–17; John 7; Acts 2:1; Romans 14:5–6; Galatians 4:9–11; Colossians 2:16–17; Isaiah 66:22–23; Ezekiel 45:21–25; Zechariah 14:16–19.

Alden A. Mosshammer, The Easter Computus and the Origins of the Christian Era (Oxford University Press, 2008), especially “Easter and the Passover Moon.”

Sacha Stern, Calendars in Antiquity: Empires, States, and Societies (Oxford University Press, 2012), chapter on early Christian Easter controversies.

C. Philipp E. Nothaft, “Early Christian Chronology and the Origins of the Christmas Date: In Defense of the ‘Calculation Theory,’” Questions Liturgiques 94 (2013): 247–265.

Paul F. Bradshaw, “The Dating of Christmas: The Early Church,” in The Oxford Handbook of Christmas (Oxford University Press, 2020).

Research foundation: The Subtleties of Idolatry – Holidays and The Subtleties of Idolatry – Holidays II.