NISAN
Nisan
Nisan on the Assyrian calendar is the first month and on the Hebrew calendar is the first month of the ecclesiastical year and the seventh month of the civil year. The name of the month is Babylonian; in the Torah it is called the month of the Aviv, referring to the month in which barley was ripe. Assyrians refer to the month as the "month of happiness." It is a spring month of 30 days. Nisan usually falls in March–April on the Gregorian calendar. In the Book of Esther in the Tanakh it is referred to as Nisan.The above text is a snippet from Wikipedia: Nisan
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