2039 (MMXXXIX) will be a common year starting on Saturday of the Gregorian calendar, the 2039th year of the Common Era (CE) and Anno Domini (AD) designations, the 39th year of the 3rd millennium, the 39th year of the 21st century, and the 10th and last year of the 2030s decade.

• January 1 – Books, movies, and other works published in 1943 will enter the public domain in the United States.
• May - 100th anniversary of the Batman.
• June 23 - 50th anniversary of the Batman (1989).
• August 25 - 100th anniversary of The Wizard of Oz.
• September 1 – 100 years since the start of WWII (Invasion of Poland)
• September 2 – The Destroyers for Bases Agreement's 99-year rent-free leases to the United States by the United Kingdom will expire.
• September 17 - Famous Korean boyband, BTS, will open a time capsule in a purple box that they gave to South Korea's President Moon for the youth which will open on the 20th National Youth day, i.e. September 17, 2039.
• December 15 - 100th anniversary of Gone with the Wind.
• December 17 - 50th anniversary of The Simpsons.