Late-life divorce (also called “silver” or “gray” divorce) is becoming more common, and more acceptable. In 2014, people age 50 and above were twice as likely to go through a divorce than in 1990, according to the National Center for Family and Marriage Research at Bowling Green State University in Ohio. For those over 65, the increase was even higher. At the same time, divorce rates have plateaued or dropped among other age groups.
See the link below for an article written by Abby Ellin on late-life divorce.