as of present time, is it still true that 4000 A.D. will NOT be a leap year?

Hello ... I can not find an authoritative source.

I have been under the impression that 4000 A.D. is an exception
to the divisible by 400 rule and therefore 4000 will NOT be a leap year.

Unfortunately Wikipedia is not authoritative.  A number of sources
I've found via Google seem to be quoting each other.

Will 4000 be a leap year?

(If yes, then we have a year 4000 problem ~~ not that that will affect all of us alive today;
 with advances in modern science, if we do not destroy each other and/or the planet,
 it may be a problem for some of us, or at least some of our descendants.)

Thank you.

Regards,
Gerry (Lowry)