NET
12 This was to take place on a certain day throughout all the provinces of King Ahasuerus—namely, on the thirteenth day of the twelfth month (that is, the month of Adar).
Darby
12 upon one day in all the provinces of king Ahasuerus, upon the thirteenth of the twelfth month, that is, the month Adar.
KJV
12 Upon one day in all the provinces of king Ahasuerus, [namely], upon the thirteenth [day] of the twelfth month, which [is] the month Adar.