Gênesis 8:14

In the second month, on the seven and twentieth day of the month. — That is, fifty-seven days after Noah removed the covering, and a year and eleven days after the flood began. The word rendered “dried” at the end of this verse is different from that translated “dried up” and “dry” in Gênesis 8:13, and marks a further stage in the process. It should be translated, was thoroughly dry.

There is in this year and eleven days a curious fact. It is reasonably certain that thirty days were reckoned to a month. But as a matter of fact, twelve lunar months do not make 360 days, but only about 354. Probably, therefore, the day of the new moon was often twice counted, as the last of the old month and the first of the new. But if to these 354 days we add 11, that is, from the 17th to the 27th of the second month. the result is exactly a full solar year of 365 days.