Why is the ninth month called September?
1540s, "of or pertaining to the sea," from Middle French maritime (16c.) or directly from Latin maritimus "of the sea, near the sea," from mare (genitive maris) "sea" (see mere (n.)) + Latin ending -timus, originally a superlative suffix (cf. intimus "inmost," ultimus "last"), here denoting "close association with." Maritimes "seacoast regions of a country" is from 1590s; specifically of the southeasternmost provinces of Canada by 1926.