Within the communities seeking to return to the Hebrew roots of the faith, a crucial question frequently arises: Should we follow the calculated Jewish calendar (Hillel II) or the calendar based on the biblical observation of the first century? Often, the writings of Church Fathers such as Epiphanius of Salamis are used to suggest that departing from the current rabbinic calendar is an error. However, a deep analysis of history, halakhah, and the authority of the Messiah reveals a very different reality.

1. The Historical Controversy: Who Fixed the Calendar?

Traditional narrative attributes the creation of the calculated calendar to Hillel II (4th century). Nevertheless, contemporary experts, such as Dr. Rachel Elior of the Hebrew University of Jerusalem, argue that this system was not fully consolidated until the 10th century with Hayyim Gaon.

It is striking that the Talmud contains no clear record of this reform by Hillel II. On the contrary, the Talmud meticulously describes how the Sanhedrin received eyewitnesses of the new moon (Rosh Chodesh) to declare the beginning of the month. The current rabbinic calendar—based on a 19-year cycle with fixed intercalary months (3, 6, 8, 11, etc.)—ignores fundamental biblical variables such as the ripening of the barley (Aviv).

2. The Problem of Authority and Semikhah

For the believer in the Messiah, the underlying question is not merely technical, but one of authority: Who constituted these rabbis as “judges” over Israel to alter the appointed times (Moadim)? The principle of authority in the Torah requires judges to have a direct chain of transmission from Moses, known as Semikhah. However, rabbinic Judaism itself admits that this chain was broken following the Roman persecutions and the destruction of the Second Temple.

Rabbinic Acknowledgment (Maimonides, Mishneh Torah, Hilkhot Sanhedrin 4:11):

“It appears to me that if all the wise men in the Land of Israel were to agree to appoint judges and grant them Semikhah, they would have Semikhah… However, the original chain of Semikhah that began with Moses our teacher was interrupted… and today we do not possess judges with original Semikhah.”

Analysis of Interrupted Authority:

• Generations without Semikhah: The Talmud (Sanhedrin 13b-14a) details the desperate efforts of Rabbi Yehuda ben Baba to preserve Semikhah under Hadrian’s persecution but acknowledges that the structure of the Sanhedrin as a court with biblical authority expired. Subsequent rabbis called themselves “sages,” but they lost the capacity to legislate changes affecting Torah commandments permanently.

• The Paradox of Halakhah d’Rabanan: While the implementation of rabbinic laws serves an organizational function, Halakhah establishes that a law of the sages cannot invalidate a law of the Torah (Devarim). The calendar, being an explicit commandment to determine the Feasts of the Eternal, enters into direct conflict when based on human calculations that ignore biblical observation.

• The Authority of the Messiah as Aleph-Tav: For us, this historical interruption confirms the need for a higher authority. While modern Hebrew roots often “demote” the Messiah to a mere rabbi, we recognize that His authority as the Aleph-Tav changes the entire legal landscape. He not only confirmed the first-century calendar but possesses the inherent authority to restore what men, by necessity or error, altered.

3. The Jewish Perspective: A “Temporary” Change

We must understand, without an inquisitive spirit, why rabbinic Judaism made these changes. In the absence of the Temple and the impossibility of convening the Sanhedrin in the Land of Israel to receive witnesses, the calculated calendar was the only option to maintain unity in the Diaspora.

The fascinating part is that Jewish thought itself admits these changes are transitory. They are not considered a “new revelation,” but an emergency measure meant to be revoked.

Acknowledgment of Transience (Maimonides, Sefer HaMitzvot, Positive Commandment 153):

“This [fixing the calendar by calculation] is a law that we only practice in the Diaspora due to the destruction of the Temple and the absence of a Sanhedrin in the Land of Israel… But when the Messiah comes and the Temple is rebuilt, we will necessarily return to the system of direct observation and the testimony of witnesses, for that is the eternal law of the Torah.”

Analysis of the Expected Restoration:

• The Messiah as Restorer: From a rabbinic perspective, this “necessary change” has no eternal repercussion; they expect that when the Messiah comes, He will “fix” these details and put the original calendar into practice. In other words, even traditional Judaism believes the Messiah will restore the calendar!

• The Paradox of the Follower of Yeshua: Here lies our greatest certainty: if the Messiah has already come (Yeshua) and He already confirmed the observation calendar of the first century, why should we follow a calendar that is supposed to be “temporary” until He arrives?

• Return to the Land: The rabbinic calendar was designed to survive in dispersion. However, for those of us reached by the Messiah’s redemption and returning to the roots of the faith, the logical path is to live under the restored calendar He already validated, anticipating the fullness of the Kingdom.

4. Epiphanius’ Testimony and the 4th-Century Context

Epiphanius of Salamis is often cited to validate the current rabbinic calendar, but an analysis of the original text reveals that Epiphanius was describing a crisis of unity, not an established norm. He refers to the calendar of the first-century Pharisees, which—according to his testimony—the Jews of his time were beginning to lose.

The Quote from Epiphanius (Panarion 70.10.2):

“The apostles decreed nothing regarding this [the day of Passover], but said: ‘We do not care when you celebrate it, as long as you do not commit errors.’ But when the Jews were in a state of disorder and had lost the correct reckoning, the apostles said: ‘Even if they err, do not worry… celebrate it when they do.'”

Technical Analysis of the Text:

• Apostolic Rule vs. Innovation: Epiphanius mentions a prior “apostolic rule.” If the text he cites existed, it predates the Hillel II reform. Therefore, the apostles referred to the observation calendar of the Second Temple, not the mathematical system that emerged centuries later.

• The Roman Church and Nicaea: Epiphanius openly admits that the Roman Church, which he represented, changed this rule after the Council of Nicaea to separate from Jewish practice. As researchers, we understand this Roman change lacks biblical basis, as does the subsequent rabbinic shift.

• The “Jewish Disorder”: The phrase “when the Jews… had lost the correct reckoning” is key. It confirms that in the 4th century, the system was in crisis. This indicates the calendar change began as an emergency measure in the academies of Sura and Pumbedita and was exported through the Diaspora until being fixed in the era of the Geonim.

Conclusion

When reading Epiphanius in context, it is clear that the modern calculated calendar is not what he is defending; he is documenting how the 4th-century Jewish world was losing the precision of the Messiah’s original calendar. If we are followers of Messiah (Mashiach), our compass should not be the “disorder” of the 4th century, but the originality of the first century that the Messiah Himself validated with His presence and fulfillment of the Feasts.

It is important to persevere in excellence, yet we must not “drown in a glass of water” over these legal debates. As believers, our justification rests upon the redemptive work of the Messiah. However, if we seek the originality of our faith, it is most logical to follow the model our Master accepted and confirmed.

The modern rabbinic calendar was a human solution for a people in exile without a Temple or Messiah. But for those who have found the Messiah, the restoration has already begun. By seeking biblical observation, we are not inventing something new; we are returning to what the Eternal entrusted to His people from the beginning and what Yeshua, the Final Authority, validated with His life.

“Then God said, ‘Let there be lights in the firmament of the heavens to divide the day from the night; and let them be for signs and seasons (Moadim), and for days and years.'” — Genesis 1:14

Author: Dr. Liber Aguiar