February 11 – North Korea fires a ballistic missile across the Sea of Japan.
February 13 – Assassination of Kim Jong-nam, the half-brother of North Korean leader Kim Jong-un.
March 10 – The UN warns that the world is facing the largest humanitarian crisis since World War II, from mass starvation.
March 30 – SpaceX launches the first reused orbital rocket for the first time in history.
April 13 – The U.S. drops the world's largest non-nuclear weapon, at an ISIS base in Afghanistan.
May 12 – At least 150 countries are hit by a large-scale ransomware cyberattack.
May 22 – An ISIS bombing at an Ariana Grande concert in Manchester, England, kills 22 people and injures more than 500.
June 1 – The U.S. Trump Administration announces it will withdraw from the Paris Climate Agreement.
June 5 – Montenegro joins NATO.
June 27 – Cyberattacks in Ukraine.
August 12 – The Unite the Right rally is held in Charlottesville, Virginia, United States, by neo-Nazis, racists and other far-right groups. Heather Heyer is killed. Trump says "Fine people on both sides."
August 17 – The first observation of a collision of two neutron stars. Gravitational waves detected.
August 25–30 – Category 4 Hurricane Harvey strikes the United States causing catastrophic damage to the Houston, Texas area.
September – Hurricanes Irma and Maria devastate the Caribbean.
October 1 – The deadliest mass shooting perpetrated by a lone gunman in U.S. history.
October 14 – A truck bombing in Mogadishu, Somalia kills hundreds.
December 5 – Russia is banned from the 2018 Winter Olympics following an investigation into state-sponsored doping.
December 9 – The Iraqi military announces that it has "fully liberated" all of Iraq's territory from ISIS.
2017 (1 Water Year / 3 Tree 9-Year Cycle / 9 Fire 81-Year Cycle)
[Water supports rising energy (Tree)]