3rd millennium

In contemporary history, the third millennium of the anno Domini or Common Era in the Gregorian calendar is the current millennium spanning the years 2001 to 3000 (21st to 30th centuries). Ongoing futures studies seek to understand what is likely to continue and what could plausibly change in the course of this period and beyond.

Predictions and forecasts not included on this timeline

 * List of future astronomical events
 * List of 21st-century lunar eclipses
 * List of solar eclipses in the 21st century
 * Projections of population growth
 * Climate change
 * Representative Concentration Pathway
 * Shared Socioeconomic Pathways
 * Extinction
 * List of dates predicted for apocalyptic events
 * Predictions and claims for the Second Coming of Christ
 * Near future in fiction
 * Works falling into the public domain in the United States

2000s

 * See: 2001
 * 2002
 * 2003
 * 2004
 * 2005
 * 2006
 * 2007
 * 2008
 * 2009

2010s

 * See: 2010
 * 2011
 * 2012
 * 2013
 * 2014
 * 2015
 * 2016
 * 2017
 * 2018
 * 2019

2020s

 * See: 2020
 * 2021
 * 2022
 * 2023
 * 2024
 * 2025
 * 2026
 * 2027
 * 2028
 * 2029

2030s
See: 2030s

Plans and goals

 * Oman Vision 2040
 * By 2049, the 100th anniversary of the People's Republic of China, the Chinese government aims for China to be a "strong, democratic, civilized, harmonious, and modern socialist country."

Expected events

 * 2041
 * The Antarctic treaty is scheduled to come under review.
 * The joint venture partnership between Volkswagen Group China and SAIC Motor is scheduled to end.
 * 2042
 * April 30: A Nickelodeon time capsule, sealed in April 1992, is scheduled to be opened.
 * September 17: A common computing representation of date and time on IBM mainframe systems will overflow with potential results similar to the year 2000 problem.
 * 2045: Centennial commemorations of the conclusion of World War II and the fall of Nazi Germany.
 * 2047: On July 1, the present "one country, two systems" arrangement in Hong Kong is scheduled to end, as it was guaranteed for 50 years starting from July 1, 1997, provided under the Hong Kong Basic Law. The agreement was raised by Deng Xiaoping to deal with Hong Kong's reunification with the People's Republic of China in 1997, and stipulated in the Sino-British Joint Declaration of 1984. What will be done is not stated in any document.
 * 2048: On January 14, the Protocol on Environmental Protection to the Antarctic Treaty is scheduled to come up for review.
 * 2049:
 * October 1: Scheduled completion of the Belt and Road Initiative, coinciding with the 100th anniversary of the founding of the People's Republic of China.
 * December 20: The present "One country, two systems" with Macau, guaranteed for 50 years starting from 20 December 1999, provided under the Basic Law and the Joint Declaration on the Question of Macau, will expire.

2050s

 * 2050:
 * Three-North Shelter Forest Program is expected to be completed.
 * The President of the United States Joe Biden says his plan will ensure that the United States will be a 100% clean energy economy and reach net-zero emissions by 2050.
 * Arnulf Jaeger-Walden of the European commission's Institute for Energy believes that solar power from North Africa can provide 100 GW to the entire continent of Europe.
 * Under a plan announced in July 2016, New Zealand aims to eradicate all non-native rats, possums, and mustelids by this year.
 * The United States Airforce is set to retire the B-52 Bomber from service.
 * A time capsule in Rachel, Nevada is set to be opened in this year.
 * 2051:
 * April: One of the METI messages Cosmic Call 1 sent from the 70-meter Eupatoria Planetary Radar in 1999 arrives at its destination, Gliese 777 star.
 * June 1: The Washington State Ferries time capsule is scheduled to be opened, celebrating WSF's 100th anniversary.
 * 2054:
 * November 7: The lease agreement International Speedway Corporation has with Daytona Beach Racing and Recreational Facilities District expires.
 * Hawksbill Creek Agreement tax exempt status is scheduled to expire.
 * 2057:
 * February: A METI message Cosmic Call 1 sent from the 70-meter Eupatoria Planetary Radar arrives at its destination, 15 Sge star.
 * May: A METI message, called the Teen Age Message, sent from the 70-meter Eupatoria Planetary Radar arrives at its destination, HD 76151 star.
 * December: A METI message, called the Teen Age Message, sent from the 70-meter Eupatoria Planetary Radar arrives at its destination, 37 Gem star.
 * In the UK, the Midland Expressway Ltd (MEL) contract to run the M6 Toll expires.
 * 2059: In January, a METI message, called the Teen Age Message, sent from the 70-meter Eupatoria Planetary Radar arrives at its destinations, HD 126053 star and HD 193664 star.

2060s

 * 2060:
 * The Chinese government aims for China to be carbon neutral.
 * 2061:
 * September 1: A time capsule at St. Gabriel School in Biggar, Saskatchewan, Canada is scheduled to be opened for its 150th anniversary of its school division (Greater Saskatoon Catholic Schools).
 * July 24: Halley's comet expected to be visible for the first time since the perihelion was last reached in 1986.
 * December 31: Expiration of the Singapore-Malaysia Water Agreement.
 * 2065:
 * The process of cleanup and decommissioning the Chernobyl Nuclear Power Plant, following the 1986 Chernobyl disaster, is projected to be finished.
 * November 22: Venus occults Jupiter, the first planet-planet occultation since 3 January 1818. The next planet-planet occultation will occur less than two years later, on 15 July 2067 (when Mercury occults Neptune).
 * 2068:
 * September 29: One of four time capsules at the Helium Centennial Time Columns Monument is scheduled to be opened 100 years after it was locked.
 * May 31: A Solar Eclipse will occur.

2070s

 * 2070: According to an announcement made by Indian prime minister Narendra Modi in 2021, India will be carbon neutral.
 * 2073: On January 1, assuming no further extensions to the term of copyrights become law in the interim, all media that was published before 1978 will have fallen into the public domain in the United States. This year in particular is significant because this is the last year when the terms of the Sonny Bono Copyright Extension Act will apply; works published after 1977 will generally fall into the public domain after 70 years post mortem auctoris.
 * 2079: For computer software using unsigned 16-bit binary day counts and an epoch of 1 January 1900, the counts will overflow after 65,536 (216) days, which will occur on 6 June 2079.

2080s

 * 2088: The University of Bologna, the world's oldest university in continuous operation, will turn 1,000 years old.
 * 2089: During the months of May and June, insect Magicicada broods X (17-year) and XIX (13-year) will emerge simultaneously. This will be the first time this will occur since 1868; next time will be in 2310. This event occurs only once in every 221 years.

2090s

 * 2090: The 9/11 Victims Compensation Fund is set to expire.
 * 2092:
 * Work on cleaning up the site of the Oldbury Nuclear Power Station is scheduled to be complete in 2092 (early estimate).
 * The second incarnation of a time capsule in Durazno, Uruguay, is scheduled to be opened after 100 years atop a pillar. The previous incarnation of the time capsule was created in 1892 and opened in 1992.
 * 2094:
 * March 19: A time capsule sealed exactly seventy-five years before is scheduled to be opened at Denver International Airport.
 * April 7: Mercury transits Jupiter, this is the only known such event of the decade.
 * 2097: A time capsule, sealed 100 years earlier, is scheduled to be opened in Baltimore's Inner Harbor to celebrate 300 years of the city's incorporation.
 * 2099:
 * The 99-year lease for Kaufman Astoria Studios in Queens, New York City is set to expire.
 * Ontario regains control of the Ontario Highway 407 when its 99-year lease expires.

2100s

 * 2100:
 * On 14 March (which will be 29 February 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 has the same day of the week for each day of the year as the Julian calendar. This will last until 28 February 2200 of the Gregorian Calendar.
 * On January 1, a time capsule placed in Hòa Bình Dam, Vietnam is scheduled to be opened.

2100s

 * 2103: Per an agreement between the National Archives and Caroline Kennedy, the jacket Jackie Kennedy wore on the day John F. Kennedy was assassinated cannot be displayed in public until this year.
 * FAT file systems theoretically support dates up to 31 December 2107 (though officially only up to 31 December 2099).
 * 2109: On April 27, a time capsule placed under the floor boards of the Old Queens Building at Rutgers University, in New Jersey, buried on 27 April 2009, is scheduled to be opened.

2110s

 * The Chernobyl New Safe Confinement reaches end of designed lifetime in the 2110s.
 * 2110: On 19 September, a time capsule at the Plaza de Armas in Santiago, Chile is intended to be opened. It was buried in 2010.
 * 2111: The will of Prince Philip, Duke of Edinburgh is scheduled to become public knowledge.
 * 2112:
 * November 18: The city of Beaumont, California in the United States is scheduled to open a time capsule in honour of its bicentennial.
 * A time capsule buried in Weavers Academy, Wellingborough, UK, will be opened after 100 years of being buried.
 * 2115:
 * The first book from the Future Library project will be published, 100 years after being submitted by author Margaret Atwood.
 * The One Hundred Year Study on Artificial Intelligence (AI100) initiated by Stanford University will be concluded.
 * November 18: In 2015, Robert Rodriguez and John Malkovich teamed up with Louis XIII de Rémy Martin (cognac) to create a film called 100 Years. It was put into a time capsule and is scheduled to be released exactly 100 years later.
 * 2116: China Merchants Port's 99-year lease on Hambantota International Port in Sri Lanka is set to expire.

2120s

 * 2120: In November, a South African vault of thousands of time capsules containing present-day information for future generations' use will be opened, 101 years after burial. The Vault 2120 is located at Maropeng in the Cradle of Humankind and was sealed in November 2019. The vault will only be opened in the year 2120. The vault and its thousands of time capsules have been buried at least two metres underground at the Maropeng Visitor Centre.

2130s

 * 2132: A time capsule on Rideau Street in Ottawa, Ontario, Canada is intended to be opened that year. It was buried in 1982.

2140s

 * 2140: All Bitcoins are expected to be mined.

2150s

 * 2155: The Year type in MySQL supports dates up to 31 December, 2155.

2180s

 * 2182: On 24 September, asteroid 101955 Bennu has a 1-in-2,700 chance of impacting Earth.

2190s

 * 2193: A time capsule at the York Civic Centre in Toronto, Ontario, Canada is scheduled to be opened that year. It was buried in 1997.

23rd century

 * 2227–2247: Pluto will be closer to the Sun than Neptune is for the first time since the year 1999.
 * 2265: Return of the Great Comet of 1861.
 * 2284: Possible the perihelion of Halley's Comet might come back after the year 2209.
 * 2285: On March 22, Easter will occur on its earliest possible date for the first time since the year 1818.

24th century

 * 2333: It is projected that the Dounreay nuclear site will be safe to use for other purposes.
 * 2353: The date of Easter as conventionally calculated will be five weeks earlier than its hypothetical date according to astronomical principles, in a "negative equinoctial paradox". Along with 2372, this will be one of only two such occurrences between 2020 and 4000.
 * 2372: The date of Easter will see another "negative equinoctial paradox", this time four weeks earlier than its hypothetical date. This will be the last such occurrence before the year 4000.
 * 2400: The first century leap year since 2000.

25th century

 * 2439 (estimated): The "Across the Universe" message broadcast by NASA in 2008 will reach Polaris.
 * 2453: 1,000 years since the fall of the Eastern Roman Empire.
 * 2464: A time capsule buried at Cape Canaveral Launch Complex 14 in the United States is intended to be opened.
 * 2476: 2,000 years since the collapse of the Western Roman Empire.
 * 2492: On October 12 it is 1,000 years since Christopher Columbus arrived in the Bahamas.

27th century

 * 2640: On September 5, the 639-year-long performance of John Cage's organ work As Slow as Possible (begun in 2001) is scheduled to finish at the St. Burchardi Church in Halberstadt, Germany.

29th century

 * The St. Michael's Catholic Cemetery (Happy Valley) in Hong Kong lease on Wanzai's Saint Fulan gentleman street will end after a 999-year lease, assuming no legal status changes before that date.
 * 2883: On January 4, the CPR (Canadian Pacific Railway) lease on the O&Q (Ontario and Quebec) will end, after a 999-year lease.

30th century

 * 2968: The Helium Centennial Time Columns Monument in Amarillo, Texas, contains four separate time capsules, the last of which is intended to be opened 1,000 years after the Time Columns Monument was locked in 1968.
 * 2999:
 * The time capsule in Chinook Centre in Calgary, Alberta, Canada is scheduled to be opened on 31 December 2999 after being sealed in 1999.
 * The Longplayer composition is set to finish on 31 December 2999, marking the end of the thousand-year piece of music which began on 1 January 2000.