Q: WHAT YEAR WAS LAMECH BORN?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 3172 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 875 AM.
Genesis 5:25 - And Methuselah lived an hundred eighty and seven years, and begat Lamech.