Aaron ben Meir
Also known as Head of the Palestinian Academy
880 CE–940 CE · Geonim · Jerusalem
Aaron ben Meir was the head (Gaon) of the Palestinian academy in the early tenth century. In 921–922 CE he proposed a change to the calculation of the Jewish calendar that would have shifted the festivals, triggering a famous dispute with Saadia Gaon and the Babylonian academies over who held the authority to fix the calendar—an episode that marked the waning of Palestinian over Babylonian leadership.
About the Controversy
In 921–922 CE, Ben Meir ignited one of the most consequential disputes of the Geonic age — a clash over who held the authority to fix the Jewish calendar. He published a new calculation of the molad (the lunar conjunction) of Tishri, by which the festivals of 922 would fall two days earlier than the reckoning used by the Babylonian academies: that year, he ruled, Passover should begin on a Sunday rather than a Tuesday, with Rosh Hashanah shifting accordingly. Beneath the technical question lay a contest of leadership — Ben Meir insisted that the calendar must be set from the Land of Israel, the ancient seat of the Sanhedrin, and denied the Babylonian centers any authority in such matters.
The Babylonian leadership resisted fiercely. The Exilarch David ben Zakkai and the academies rejected his calculation, and a young Saadia ben Yosef — soon to become Gaon of Sura — emerged as the decisive opponent, marshaling the mathematical and halachic case against him and composing his Sefer ha-Mo'adim ('Book of the Festivals') to refute it. For two years parts of the Jewish world kept the festivals on different days. In the end Ben Meir's position failed: he was placed under a ban, circular letters were sent warning communities against his reckoning, and the Babylonian calculation prevailed. The episode is remembered as a turning point — the moment that confirmed Babylonia, not the Land of Israel, as the arbiter of Jewish practice for the centuries that followed, and that launched the public career of Saadia Gaon.
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JerusalemירושליםJudea
What they did here
Head of the Palestinian academy in the early tenth century; his 921–922 calendar proposal triggered the celebrated dispute with Saadia Gaon and the academies of Babylonia.
About Jerusalem
# Jerusalem Jerusalem has remained the spiritual and intellectual heart of Jewish learning across nearly two thousand years of exile, diaspora, and return. Perched on the stony hills of Judea, this ancient city—ruled by Romans, Byzantine Christians, Muslim caliphates, Crusaders, Ottomans, and finally restored to Jewish sovereignty in 1948—never ceased to draw sages seeking to study Torah in the very place where the Second Temple once stood. The Jewish community here, though often small and struggling under foreign rule, maintained an unbroken chain of learning and mysticism: the city's narrow stone alleyways in the Old City's Jewish Quarter became pathways to yeshivas where kabbalah flourished, especially from the sixteenth century onward when mystical teachings transformed the study of Jewish law and theology. The climate is cool and dry on the heights, with Jerusalem's limestone buildings glowing pale gold in the Mediterranean sun. What made Jerusalem irreplaceable was not merely its holy history but the conviction that studying and teaching Torah within its walls carried cosmic significance—that the city itself was a living connection to revelation. Today, Jerusalem pulses with dozens of major yeshivas and study halls, their students debating Talmud in the same streets where Jewish learning has never truly been interrupted.
The world in their lifetime
Thinkers and teachers of other traditions whose lives overlapped with Aaron ben Meir’s — a glimpse of the wider world they lived in. Drawn purely from recorded birth and death years.
Islamic world
Buddhist world
Works
No works attributed in the corpus yet.