American Tract Society Bible Dictionary
A Hebrew month, nearly answering to our April, but varying somewhat from year to year, according to the course of the moon. It was the seventh month of the civil year; but was made the first month of the sacred year, at the coming out of Egypt, Exodus 12:2 . By Moses it is called Abib, Exodus 13:4 . The name Nisan found only after the time of Ezra, and the return from the captivity of Babylon. See MONTIS.
These files are public domain and are a derivative of the topics are from American Tract Society Bible Dictionary published in 1859.
Rand, W. W. Entry for 'Nisan'. American Tract Society Bible Dictionary. https://www.studylight.org/dictionaries/eng/ats/n/nisan.html. 1859.