'Month' in the Bible

But in the sixth month, the angel Gabriel was sent of God to a city of Galilee, of which the name was Nazareth,

And behold, Elizabeth, thy kinswoman, she also has conceived a son in her old age, and this is the sixth month to her that was called barren:

And the four angels were loosed, who are prepared for the hour and day and month and year, that they might slay the third part of men;

In the midst of its street, and of the river, on this side and on that side, the tree of life, producing twelve fruits, in each month yielding its fruit; and the leaves of the tree for healing of the nations.