Tenth by the first,
And tenth by the second,
Third by the third, yet always
thirty by all who reckon.
Narquelie
Narquelië was the tenth month of the year, according to the Kings' and Stewards' Reckoning of Gondor, and the seventh month according to the New Reckoning; following the month of Yavannië in the Kings' Reckoning, the harvest feast of Yáviérë in the Stewards' Reckoning, the Enderi in the New Reckoning, and preceding Hísimë in all 3 calendars.
Tolkien Gateway: Narquelië
Thank you to Clif Weatherford for confirming this answer on 2 November 2020