2029 (MMXXIX) will be a common year starting on Monday of the Gregorian calendar, the 2029th year of the Common Era (CE) and Anno Domini (AD) designations, the 29th year of the 3rd millennium and the 21st century, and the 10th and last year of the 2020s decade.

• March – 2029 Special Olympics World Winter Games in Switzerland.
• April 13 – Asteroid 99942 Apophis, at 335 metres (1,100 feet) wide, will pass Earth less than 32,000 kilometres (20,000 miles) from Earth's surface: closer than geosynchronous satellites. When discovered, it was considered a serious threat to Earth, but since then refined predictions have ruled out any impact risk for the next 100 years. This will be the closest approach of an asteroid this size scientists have predicted.^[1]
• August 15 – If not triggered earlier, the next United Kingdom general election will occur no later than this date.
• October 29 – the 100th anniversary of the 1929 stock market crash that led to the onset of the Great Depression.

• Planned launch of the Comet Interceptor.^[2]
• The Fehmarn Belt fixed link between Denmark and Germany is expected to be completed.
• The Giant Magellan Telescope, which is currently under construction, is scheduled for completion.^[3]
• The Three Seas Initiative (3SI) estimates to end the Rail-2-Sea project by this year.^[4]
• Romania expects to have entered the eurozone by this year.^[5]
• The digital time capsule "A Message from Earth" will reach its destination on the planet Gliese 581c.
• NASA's New Horizons spacecraft is expected to leave the Solar System.
• Ray Kurzweil predicts artificial general intelligence during this year. AGI is artificial intelligence that can do most things a human can do and has achieved human level intelligence. Kurzweil also predicts that AI will pass the Turing test.
• 2029 Asian Winter Games
• The 2029 Indian General election will be held between April and June. The results will decide the next Prime Minister of India.
• The 2029 South African general election should be held around May or June.