Ni·san 
(nĭsən, nē-sän)
(nĭsən, nē-sän)n.
The first month of the year in the Jewish calendar. See Table at calendar.
[Hebrew nîsān, from Akkadian nisānu, the first month in the Babylonian calendar (corresponding to parts of March and April), from Sumerian nisag, first fruits : nig, ni, thing, nominalizing pref. + sag, head, top, first.]