In the days of Noah
In Genesis Chapters 7 and 8 we read,
Genesis 7:11 In the six hundredth year of Noah’s life, in the second month, the seventeenth day of the month, the same day were all the fountains of the great deep broken up, and the windows of heaven were opened.
12 And the rain was upon the earth forty days and forty nights.
24 And the waters prevailed upon the earth a hundred and fifty days.
Genesis 8:3 And the waters returned from off the earth continually: and after the end of the a hundred and fifty days the waters were abated.
4 And the ark rested in the seventh month, on the seventeenth day of the month, upon the mountains of Ararat.
The time period from the 17th day of the 2nd month to the 17th day of the 7th month (a period of exactly 5 months), is 150 days. This implies that a biblical month has 30 days, and a Biblical year has 360 days.
(Please note that the Biblical calendar is not the same as our calendar. Even though it looks like this must be the 17th of February to the 17th of July (which also happens to be 150 days), But the Biblical year starts somewhere in our month of March (at barley harvest time, when the barley is ripe for harvesting ) when the Jewish year starts.) It is called Abib.
But, read very carefully, it is the “600th year of Noah’s life” which is dated from his unknown birthday. So we have absolutely no idea what month the starting day is. But let us be assured that the calendar in the book of revelation worked the same accurate period of God as the scriptures make us to know
The calendar in book of Revelation
The prophetic calendar in the Bible works in the same way.
Revelation 11:1 And there was given me a reed like unto a rod: and the angel stood, saying, Rise, and measure the temple of God, and the altar, and them that worship therein.
2 But the court, which is without the temple leave out, and measure it not; for it is given unto the Gentiles: and the holy city shall they tread under foot forty and two months.
3 And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, …
6 These have power to shut heaven, that it rains not in the days of their prophecy: and have power over waters to turn them to blood, and to smite the earth with all plagues…
