3rd millennium

Events
Main article: 21st century
See also: 2000s (decade), 2010s, and 2020s
Further information: Timeline of the 21st century

Predicted events

As this millennium is currently in progress, events which have occurred before the present day are the subject of historians' attention. The future is researched in futures studies. Here are some events that may happen:

Time capsules
  • April 27, 2109 – A time capsule placed under the floor boards of the Old Queens Building at Rutgers University, in New Jersey, United States buried on April 27, 2009, is scheduled to be opened.[1]
  • 2068 and 2968 – The Helium Centennial Time Columns Monument in Amarillo, Texas, contains four separate time capsules, the last two of which are intended to be opened 100 and 1,000 years after the Time Columns Monument was locked in 1968.
  • 2999 – The time capsule at Chinook Centre in Calgary, Alberta, Canada is scheduled to be opened on December 31, 2999 after being sealed in 2000.

Astronomical events

21st century
  • April 13, 2029 – Near-Earth asteroid (99942) Apophis will pass Earth at a relatively small distance of 31,200 kilometres (19,400 mi) above Earth's surface, closer than some geosynchronous satellites.[2]
  • August 12, 2045 – A total solar eclipse will take place in the United States, producing a path from California to Florida. Some parts of Florida are predicted to experience totality for six minutes, the longest in US history.
  • February 29, 2048 – A full moon will occur on leap day. The next full moon on a leap day will not occur until February 29, 2124.[3]
  • Mid-2061 – Next appearance of Comet Halley.
  • October 27, 2088 – Mercury occults Jupiter, the first time since 1708, but very close to the Sun and impossible to view with the naked eye.
  • September 23, 2090 – Total solar eclipse in the UK. The next total eclipse visible in the UK follows a track similar to that of August 11, 1999, but shifted slightly further north and occurring very near sunset. Maximum duration in Cornwall will be 2 minutes and 10 seconds. Same day and month as the eclipse of September 23, 1699.
  • April 7, 2094 – Mercury occults Jupiter; it will be very close to the Sun and impossible to view with the naked eye.

22nd century
  • December 11, 2117 – Transit of Venus.[4]
  • September 14, 2123 – At 15:28 UTC, Venus will occult Jupiter.[5]
  • December 8, 2125 – Transit of Venus.[6]
  • July 29, 2126: At 16:08 UTC, Mercury will occult Mars.[7]
  • December 3, 2133 – At 14:14 UTC, Mercury will occult Venus.
  • 2134: Comet Halley will return to the inner solar system.
  • 2135–2136: Halley's comet will be at perihelion.
  • September 2, 2197 – Venus occults Spica.
    Last occultation of Spica by Venus was on November 10, 1783.
  • December 24, 2197 – Earth's Moon will occult Neptune.

23rd century
  • 2209 and 2284 – perihelion of Comet Halley.
  • May 27, 2221 – near-Earth asteroid (285263) 1998 QE2 will pass Earth at a distance of 0.038 AU (5,700,000 km; 3,500,000 mi).[8]
  • 2221 – Triple conjunction of Mars and Saturn.
  • December 2, 2223 – At 12:32 UTC, Mars will occult Jupiter.
  • 2238/39 – Triple conjunction of Jupiter and Saturn (whose last triple conjunction was in 1981).
  • August 12, 2243 – At 04:52 UTC, Venus will occult Saturn.
  • June 11, 2247 – Transit of Venus.
  • March 4, 2251 – At 10:52 UTC, Venus will occult Uranus.
  • In 2252, the planetoid Orcus will have completed one orbit of the Sun since its discovery in 2004, based upon current orbital measurements which give it a period of 248 Earth years.
  • August 1, 2253 – Mercury occults Regulus (last occultation of Regulus by Mercury was on August 13, 364 BC).
  • June 9, 2255 – Transit of Venus.
  • 2256 to 2258 – Eris will reach perihelion for the first time since discovery.
  • 2265 – Return to perihelion by the Great Comet of 1861.
  • October 6, 2271 – Close conjunction between Venus and Regulus, perhaps occultation of Regulus by Venus.
  • 2279 – Triple conjunction of Jupiter and Saturn.
  • 2281/82 – Grand Trine of Uranus, Neptune, and Pluto. This last occurred in 1769 and 1770.
  • Sunday, August 28, 2287 – Closest approach between Mars and Earth since Wednesday, August 27, 2003.
  • In 2288, the planetoid Quaoar will have completed one orbit of the Sun since its discovery in 2002, which, based upon current orbital measurements, gives it a period of 286 Earth years.

24th century
  • September 11, 2307 – At 22:50 UTC, Venus will occult Uranus.
  • 2313 – Triple conjunction Mars–Jupiter.
  • 2319 – Triple conjunction Mars-Saturn.
  • June 4, 2327 – At 00:54 UTC, Venus will occult Mars.
  • October 8, 2335 – At 14:51 UTC, Venus will occult Jupiter.
  • April 7, 2351 – At 17:22 UTC, Mercury will occult Uranus.
  • December 13, 2360 – Transit of Venus.
  • 2365 – Perihelion of Comet Halley.
  • December 10, 2368 – Transit of Venus.
  • 2388 – Triple conjunction Mars-Saturn.
  • May 11, 2391 – Partial transit of Mercury.
  • November 17, 2400 – Venus will occult Antares (last occultation of Antares by Venus was on September 17, 525 BC).

25th century

26th century

27th century
  • December 16, 2603 – Transit of Venus.
  • May 13, 2608 – Grazing Transit of Mercury.
  • December 13, 2611 – Partial transit of Venus.
  • 2626/27 – Triple conjunction Mars–Saturn.
  • 2629 – Triple conjunction Mars-Saturn.
  • February 16, 2649 – At 11:17 UTC, Venus will occult Neptune.
  • September 3, 2650 – The distance between Mars and Earth will arrive at a new remarkable minimum, at 55,651,582.118 km.
    It will be the closer encounter of perihelic opposition slightly shorter (by 37,000 km) than the previous one of the August 28, 2287.[13]
    The following closer encounter will be on September 8, 2729.
  • 2655/56 – Triple conjunction Jupiter-Saturn.
  • 2663 – Triple conjunction Mars-Saturn.
  • 2699/2700 – Triple conjunctions between Mars-Jupiter, Mars-Neptune and Jupiter-Neptune.

28th century
  • October 24, 2714 – Transit of Jupiter from Uranus. First one since May 3, 1914.
  • September 8, 2729 – The distance between Mars and Earth will arrive at a new remarkable minimum, at 55,651,033.122 km.
    It will be the closer encounter of perihelitic opposition slightly shorter (just 549 km) than the previous one of the September 3, 2650.[14]
  • June 15, 2733 – Transit of Venus.
  • June 13, 2741 – Transit of Venus.
  • 2742 – Triple conjunction Mars–Jupiter.
  • 2744 – Triple conjunction Mars–Jupiter.
  • 2761 – Triple conjunction Mars–Saturn.
  • December 3, 2781 – At 06:45 UTC, Venus will occult Neptune.
  • 2791 – Triple conjunction Mars–Jupiter.
  • 2794/95 – Triple conjunction Jupiter–Saturn.

29th century
  • The remnants of Comet Ikeya-Seki are expected to return to the inner Solar System.
    It was last seen from Earth in 1965–1966, and broke into three pieces as it approached the Sun.
  • March 25, 2816 – At 15:47 UTC, Mercury will occult Jupiter.
  • March 6, 2817 – At 9:36 UTC, Venus will occult Saturn.
  • April 11, 2818 – At 20:41 UTC, Mercury will occult Mars.
  • February 6, 2825 – At 10:50 UTC, Mars will occult Uranus.
  • 2829/30 – Triple conjunction Mars-Saturn.
  • December 15, 2830 – At 09:40 UTC, Venus will occult Mars.
  • 2842/43 – Triple conjunction Mars-Jupiter.
  • December 16, 2846 – Transit of Venus.
  • December 14, 2854 – Partial transit of Venus.
  • July 20, 2855 – At 05:15 UTC, Mercury will occult Jupiter.
  • 2866 – Triple conjunction Mars-Saturn.

Biological events
  • 2099 – According to one study, 83% of the Amazon rainforest may have been destroyed.[15]
  • By 2100, 12% (about 1,250) of the bird species existing at the beginning of the 21st century are expected to be extinct or threatened with extinction.[16]
  • By 2100, emperor penguins could be pushed to the brink of extinction due to global climate change, according to a Woods Hole Oceanographic Institution study from January 2009. The study applied mathematical models to predict how the loss of sea ice from climate warming would affect an Antarctica colony of emperor penguins, and they forecast a decline of 87% in the colony's population by the end of the century.[17]

Calendric predictions
  • January 19, 2038 – 32-bit computer clocks overflow to represent the date as December 13, 1901.
  • 2096 will be the last leap year in the 21st century. The year 2100 will not be a leap year, as it is divisible by 100 but not by 400, and it is the first such year since 1900.
  • On March 14, 2100 (which will be February 29, 2100 in the Julian calendar), the difference between the Julian calendar and the Gregorian calendar reaches 14 days. Since 14 is divisible by 7, this will be the first time in history since its inception that the Gregorian calendar will have the same day of the week for each day of the month for the whole year as the Julian calendar. This will last until February 28, 2200 of the Gregorian Calendar.
  • FAT file systems theoretically support dates up to December 31, 2107 (though officially only up to December 31, 2099).
  • The Year type in MySQL supports dates up to December 31, 2155.
  • March 17, 2160 – Unless changes are made as to when Easter can be observed, this particular March 17 will fall within Holy Week for the first time since 2008 and fall on the same day (Monday) as it did in that year.[18]
  • Unless changes are made in the religious calendar, in 2285, the Western Easter will fall on March 22 for the first time since 1818, the earliest possible date on which Easter can occur.[19]
  • 2400 and 2800 are the century leap years in the 3rd millennium. Those are evenly divisible by 400.
  • March 1, 2800 – The Revised Julian and Gregorian calendars will differ by a day.
  • March 1, 3000 (which will be February 9, 3000 in the Julian calendar) will be the second time when Julian and Gregorian calendars will have the same day of the week as the difference between the Old and New style will reach to 21 days, since 21 is exactly divisible by 7.

Technological predictions

Social predictions
  • As of December 2009, the United States Census Bureau projects a world population of 8.4 billion by 2030.[31]
  • French demographist Emmanuel Todd predicts the level of literacy amongst the world population to reach near 100% by 2030.[32]
  • Gerontologist Aubrey de Grey predicts there is a "50/50 chance" of curing aging by around the year 2036.[33]
  • World population is predicted to reach 9.3 billion people by 2050, according to United Nations Population Division.[34]
  • French demographist Emmanuel Todd predicts worldwide zero population growth birth rates by 2050.[32]
  • The United Kingdom could have the largest population in Europe by 2050 and be the third biggest recipient of migrants in the world, UN projections suggest.[35]
  • 2160 – Some scientists believe there are babies born in 2010 who may still be alive in 2160.[36]
  • According to the UN Population Bureau, life expectancy in 2200 is predicted to be around 100 for developed countries and the world population is estimated to be about 8.5 billion. The UN says that these projections could be invalidated by changes and progression in future life extension technology and discoveries, as well as changes in future birthrates.[37]
  • 22nd century – In his book The Next 100 Years, American political scientist George Friedman predicts that as the century begins, an ongoing confrontation between an increasingly powerful Mexico and the United States will be taking place. Mexico will be an economically and militarily powerful country capable of challenging the United States, while a Mexican majority in southern regions of the United States will have made them a de facto extension of Mexico, with increasing secessionist sentiment. Both countries will be competing for dominance over North America, which will remain the international center of gravity throughout the next few centuries.[38]

Centuries and decades
21st century 2000s[lower-alpha 1] 2010s 2020s 2030s2040s 2050s 2060s2070s 2080s2090s
22nd century 2100s2110s 2120s 2130s2140s 2150s 2160s2170s 2180s2190s
23rd century 2200s2210s 2220s 2230s2240s 2250s 2260s2270s 2280s2290s
24th century 2300s2310s 2320s 2330s2340s 2350s 2360s2370s 2380s2390s
25th century 2400s2410s 2420s 2430s2440s 2450s 2460s2470s 2480s2490s
26th century 2500s2510s 2520s 2530s2540s 2550s 2560s2570s 2580s2590s
27th century 2600s2610s 2620s 2630s2640s 2650s 2660s2670s 2680s2690s
28th century 2700s2710s 2720s 2730s2740s 2750s 2760s2770s 2780s2790s
29th century 2800s2810s 2820s 2830s2840s 2850s 2860s2870s 2880s2890s
30th century 2900s2910s 2920s 2930s2940s 2950s 2960s2970s 2980s2990s

Notes
  1. Only the nine years 2001–2009 of the 2000s decade were in the 3rd millennium; the year 2000 was the last year of the 2nd millennium (1001–2000). The year 2000 is the first year of the 2000s millennium (2000–2999) which is used interchangably with the 3rd millennium though the start and end dates differ by a year.

References
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  2. "NASA Rules Out Earth Impact in 2036 for Asteroid Apophis". NASA/JPL. Retrieved May 11, 2020.
  3. Plait, Phil (June 13, 2014). "Wait. What About a Full Moon on Feb. 29?". Slate Magazine. Retrieved June 22, 2020.
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  14. [meteorite-list] Mars Makes Closest Approach In Nearly 60,000 Years Archived July 2, 2015, at the Wayback Machine, par Ron Baalke, on Friday August 22, 2003 at 09:04:54 -0700
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  25. city in pyramid on YouTube
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