Isaac's Birth Year—Abraham Age 100—Genesis 21:5

Q: WHAT YEAR WAS ISAAC BORN? A: IT DEPENDS WHAT CALENDAR YOU ARE USING! On the Gregorian calendar (the one you might have on your wall) the year was 1933 BC. On the Hebrew calendar, sometimes called the biblical calendar, the year was 2114 AM. RELATED VERSES Genesis 21:5 Now Abraham was one hundred years old when his son Isaac was born to him.