Q: WHAT YEAR WAS SETH BORN?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 3916 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 131 AM.
Genesis 5:3 – And Adam lived an hundred and thirty years, and begat a son in his own likeness, and after his image; and called his name Seth