NET
15 They finished this temple on the third day of the month Adar, which is the sixth year of the reign of King Darius.
Darby
15 And this house was finished on the third day of the month Adar, which was in the sixth year of the reign of king Darius.
KJV
15 And this house was finished on the third day of the month Adar, which was in the sixth year of the reign of Darius the king.