On what day of Noah’s 600th year did the floodwaters begin, according to Genesis?

Genesis says the floodwaters began on the seventeenth day of the second month of Noah’s 600th year. The date appears alongside references to the fountains of the deep opening and the windows of heaven being opened.

This is one of several chronological markers in the flood narrative. Genesis later gives dates for the Ark coming to rest, the mountain tops becoming visible, and Noah finally leaving the Ark. Those details create a structured timeline rather than describing the flood only in general terms.

The month names are not supplied in this passage, so readers should not automatically convert the date into a modern calendar date. Later biblical calendars and interpretive traditions may assign different month systems. The seventeenth day of the second month is the specific wording of the Genesis chronology.