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Predicted and scheduled events
- January 15–25 – The 2027 Winter World University Games are scheduled to be held in Changchun, China.
- January 20–February 7 – The 2027 African Games will be held in Cairo.
- January 30 – The 2027 German presidential election is scheduled to be held.
- March 7 – If not triggered earlier, the next Estonian parliamentary election will occur no later than this date.
- March 19 – September 26 – The 2027 World Horticultural Expo is scheduled to be held in Yokohama, Japan.
- April 18
- The 2027 Finnish parliamentary election is scheduled to be held.
- If not triggered earlier, the 2027 French presidential election will be held no later than this date.
- May – The 2027 Eurovision Song Contest is scheduled to be held in Bulgaria.
- May 15 – August 15 – Expo 2027 is scheduled to be held in Belgrade, Serbia.
- June 16–27 – Istanbul, Turkey, will host the 2027 European Games.
- June 6 – The 2027 Mexican legislative election is scheduled to be held.
- June 19 – July 17 – The 2027 Africa Cup of Nations is scheduled to be hosted by Kenya, Uganda and Tanzania.
- June 24 – July 25 – The 2027 FIFA Women's World Cup is scheduled to be held in Brazil.
- July 16 – August 1 – Lima, Peru, will host the 2027 Pan American Games.
- July 24 – August 8 – The 2027 Pacific Games is scheduled to be held in Tahiti.
- July 25 – If not triggered earlier, the next Greek parliamentary election will occur no later than this date.
- August 10 – The 2027 Kenyan general election is scheduled to take place.
- August 1–12 – The 2027 Summer World University Games will be held in Chungcheong Province, South Korea.
- August 22 – If not triggered earlier, the next Spanish general election will occur no later than this date.
- August 27 – September 12 – The 2027 FIBA Basketball World Cup is scheduled to be held in Qatar.
- September 1
- Pope Leo XIV is expected to celebrate his golden jubilee of religious life and be honored.
- The autonomous region of Bougainville has recommended this date for independence from Papua New Guinea, pending ratification of the 2019 referendum.
- September 28 – If not triggered earlier, the next Slovak parliamentary election will be held no later than this date.
- October 1 – November 13 – The 2027 Rugby World Cup will take place in Australia.
- October 16–24 – The 2027 Special Olympics World Summer Games will be held in Santiago, Chile.
- October 24 – The 2027 Argentine general election is scheduled to be held.
- October 27 – November 4 – The 2027 Commonwealth Youth Games will be held in Malta.
- November 11 – If not triggered earlier, the next Polish parliamentary election will occur no later than this date.
- December 22 – If not triggered earlier, the next Italian general election will occur no later than this date.
- December 31 – If not triggered earlier, the next Serbian parliamentary election will occur no later than this date.
Date unknown
- Early/Mid 2027 – In Altoona, The Shoppes at Prairie Crossing is planned to open.
- Late 2027 – Artemis III, the second crewed mission of the Artemis program, is scheduled to launch.
- World Youth Day 2027 will be held in South Korea.
- The 2027 Cricket World Cup will take place in South Africa, Zimbabwe and Namibia.
- The first Olympic Esports Games will be held in Riyadh in 2027.
- The first WrestleMania held outside of North America will be held in Riyadh, Saudi Arabia in 2027.
- The 2027 Arab Games will be held in Riyadh, Saudi Arabia.
- The 2027 Military World Games will be held in Charlotte, North Carolina, U.S.
