סִיוָן, (b. h.) Sivan, the third month of the Hebrew calendar, of thirty days, varying between the tenth of May and the eighth of July. Targ. Esth. VIII, 9. Targ. II Esth. III, 7; a. e.—Sabb. 87ᵇ. R. Hash. 7ᵇ ששה בס׳ וכ׳ the sixth of S. is the New Year for the two loaves (the wheat crop); a. e.