The meaning of Year in the Bible
(From International Standard Bible Encyclopedia)

yer (shanah, Aramaic shenah, "a return" (of the sun), like the Greek eniautos; yamim, "days," is also used for "year," and the Greek hemerai, corresponds to it (Joshua 13:1; Luke 17,18); etos, is also employed frequently in the New Testament; for the difference between etos and eniautos, see Grimm-Thayer, under the word): The Hebrew year was solar, although the month was lunar, the adjustment being made in intercalation.

See ASTRONOMY; TIME.

See more on the meaning of Year in the Bible:
Year {Easton's Bible Dictionary}

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