Hillel II

Who is Hillel II?

Hillel II, also known simply as Hillel held the office of Nasi of the ancient Jewish Sanhedrin between 320 and 385 CE. He was the son and successor of Judah III. He was a Jewish communal and religious authority, circa 330 - 365 CE. He is sometimes confused with Hillel the Elder, as the Talmud sometimes simply uses the name "Hillel".

In two instances his name is quoted in connection with important decisions in Jewish law: in one, Jose ben Abin expounds to him a law; in the other, Hillel cites a mishnah to establish a law.

He is traditionally regarded as the creator of the modern fixed Hebrew calendar. However this attribution is tenuous. It first appears in a responsum of R. Hai Gaon cited by R. Avraham b. Hiyya in his Sefer Ha'ibbur, written in 1123. The topic of that responsum is the 19-year cycle for leap-year intercalations, so the most that can be inferred from that attribution is that Hillel was responsible for the adoption of that cycle for the regulation of the distribution of leap-years. Scholars who have studied the history of the Hebrew calendar are in general agreement that in practice, the evolution of the calendar into its present form was a gradual process spanning several centuries from the first to about the eighth or ninth century CE. The champion of the view that the calendar was developed in the eighth or ninth century CE is Sacha Stern. This quote is from page 184-5 of his book Calendar and Community