The tenth millennium of the Gregorian calendar will begin on January 1, 9001, and end on December 31, 10000. It will be the tenth millennium in the Anno Domini or Common Era.
10th millennium Wikipedia
All these dates are in a uniform time scale such as Terrestrial Time. When converted to our ordinary solar time or Universal Time, which is decidedly non-uniform, via ΔT, the dates would be a couple of days earlier. Furthermore, they are only astronomical dates, so they are given in the astronomical format of Year Month Day, which allows them to be ordered.9106 November 5: Venus occults Regulus.
9168 November 21: Mean solar time and atomic time will be two days apart.
9361 August 4: Simultaneous annular solar eclipse and transit of Mercury.
9622 February 4: Simultaneous annular solar eclipse and transit of Mercury.
9682 November 16: Mercury occults Regulus.
9847 November 21: Mars occults Regulus.
c. 9800: Earth's axial precession makes Deneb the North star.
9966 August 11: Simultaneous total solar eclipse and transit of Mercury.
Software that encodes the CE / AD calendar year of a date as a four-character binary-coded decimal will no longer be able to encode the contemporaneous date.