Question

The first Chief Justice of the U.S. Supreme Court, John Jay, served 2079 days as Chief Justice. He served 10,463 days fewer than John Marshall, who served as Supreme Court Chief Justice for the longest period of time. How many days must the current Supreme Court Chief Justice John Roberts serve to surpass John Marshall’s record of service?

Answer 1

Here's a listing of ALL 113 Supreme Court Justices.

1728.com/supcourt.htm

And here is a great date to date calculator

https://www.timeanddate.com/date/durationresult.html?m1=10&d1=06&y1=1951&m2=09&d2=10&y2=2018

Answer 2

It would be however many days John Roberts has served + x = 12,542