a.dar is the named twelfth month used to date events and annual observances in Esther.

The term consistently identifies the twelfth month in dates: it marks the scheduled thirteenth day in royal decrees and the fourteenth and fifteenth days connected with rest, joy, feasting, and annual observance.

1. The twelfth month in dated events and observances · dominant

   The supplied form is tagged Noun · Proper in each cited verse and occurs in month-and-day dating expressions. In Esther 3:13 and Esther 8:12 the APB renders a thirteenth day of the twelfth month for decrees; in Esther 9:15, Esther 9:19, and Esther 9:21 it renders the month in connection with assembly, joy and feasting, and an established yearly observance.

   Esther 3:13Esther 8:12Esther 9:15Esther 9:19Esther 9:21

In the Anselm Project Bible: The APB consistently presents the term as the month name in date expressions, including “the month of Adar” and “the month Adar.” These renderings confirm the verse-level date setting rather than isolate every lexical contribution.