In the Book of Genesis, on which day of Noah’s 600th year did the flood begin?

In the Book of Genesis, the flood began on the 17th day of the second month of Noah’s 600th year. Genesis 7:11 gives this date while describing the bursting of the fountains of the deep and the opening of the windows of heaven.

This is one of the most precise calendar statements in the flood narrative. Genesis identifies Noah’s age and the month and day, but it does not state the name of the month in a modern calendar or provide a universally agreed conversion to a modern date.

The story later records other dates, including the day the Ark rested on the mountains of Ararat and the time when the ground became dry. These dated notices create a narrative chronology, although readers and traditions differ in how they reconcile the various intervals.