נִיסָן, Del. Proleg., p. 138, note) Nisan, the first month of the Hebrew calendar, containing thirty days, varying between the sixteenth of March and the eighth of May. R. Hash. I, 1 באחד בנ׳ ראש וכ׳ on the first of Nisan begins the royal year. Ib. 2ᵇ מת בנ׳ … בנ׳ וכ׳ if a king dies in N., and his successor ascends the throne in N., we count a year for the one, and one (the first year) for the other; a. v. fr.