10th millennium

Millennia:	9th millennium 10th millennium 11th millennium
Centuries:	91st century 92nd century 93rd century 94th century 95th century 96th century 97th century 98th century 99th century 100th century

"9999" redirects here. It is not to be confused with 999.

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.

Astronomical events

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.

Year 10,000 problem

Main article: Year 10,000 problem

Software that encodes the AD calendar year of a date as a four-character binary-coded decimal will no longer be able to encode the contemporaneous date.

Television

• In the Futurama episode "The Late Philip J. Fry", the Professor, Bender and Fry travel in the Professor's Time Machine in which they find a five-times over Post-Apocalyptic future in the year 10,000. There is a ruin of the human Statue of Liberty in line with four others, one of an ape, bird, cow and a slug-like creature.
• In The Simpsons episode "Replaceable You", Lisa Simpson says her science fair project proves that an asteroid will strike the earth on July 15, 9789. To this Bart replies: "Who cares? I'll be President of Hell by then".
• In Aqua Teen Hunger Force the Cybernetic Ghost of Christmas Past from the Future also refers to 9595 and is from this year.

Music

• In the song "In the Year 2525" by Zager and Evans, it is predicted that humankind will have exhausted all planetary resources by the year 9595.

See also

• The Long Now Foundation, a non-profit that encourages long-term thinking with one practical application of using a leading zero to form dates (such as August 2, 02015).

References

• Simultaneous Transits by Meeus and Vitagliano (pdf, 315KB)
• Conjunctions of Regulus and the planets (German)
• Accuracy of calculations (German)