Ethanim

ETHANIM ĕth’ ə nĭm (אֵֽתָנִ֖ים, pl. of ’êtān, continual, permanent, ever-flowing). A Heb. word that usually refers to rivers that flow the year round. In 1 Kings 8:2 the word is transliterated as it names the seventh month (Tishri, Sept-Oct), the month when all but permanent rivers are dry, preceding the early rains. It dates the month Solomon brought the Ark to the new Temple in Jerusalem.

International Standard Bible Encyclopedia (1915)

(’ethanim):

The seventh month of the Jewish year (1Ki 8:2). The word is of Phoenician origin and signifies "perennial," referring to living streams. It corresponds to September-October.

See Calendar; Time.