Adar (Hebrew: אֲדָר, ʾĂdār; from Akkadian adaru) is the sixth month of the civil year and the twelfth month of the religious year on the Hebrew calendar, roughly corresponding to the month of March in the Gregorian calendar. It is a month of 29 days. Names and leap years. The month's name, like all the others from the Hebrew calendar, was adopted during the Babylonian captivity. In the Babylonian calendar the name was Araḫ Addaru or Adār ('Month of Adar').
https://en.wikipedia.org/wiki/Adar