Israel withdraws from the Gaza Strip, officially ending its three-week war with Hamas.[10] However, intermittent air strikes by both sides continue in the following weeks.[11][12][13]
February 13 – At 23:31:30 UTC, the decimal representation of Unix time reached 1234567890 seconds. Celebrations were held around the world, among various technical subcultures, to celebrate the 1234567890th second.[22]
February 15 – Yume Nikki inspired game created by lolrust titled .flow releases. Here, you see through the eyes of Sabitsuki, who enters her computer and explores disease-ridden, rusted worlds.
February 25 – Soldiers of Bangladeshi border security force Bangladesh Rifles (BDR) mutiny and take the commanding army officers and their families hostages at the force's headquarters in Pilkhana, Dhaka. 57 army officers are killed along with 17 civilians by the mutineers.
June 25 – The death of American pop star Michael Jackson triggers an outpouring of worldwide grief. Online, reactions to the event cripple several major websites and services, as the abundance of people accessing the web addresses pushes internet traffic to unprecedented and historic levels.[38]
October 24 – The 2009 El Ayyat railway accident occurred in Giza, Egypt, when a passenger train derailed due to stoppage of animals on the train tracks. 50 people were killed and 30 people were injured.[65]
Censorship, Index on (October 14, 2009). "A gag too far". Index on Censorship. Archived from the original on February 27, 2021. Retrieved March 12, 2021.
The Treaty of Lisbon entered into force on December 1, 2009, the six-month rotating presidency of the European Council ceased to exist (as the provision for its existence has been erased from the Treaties in force), and the new office of President of the European Council came into being. The appointment of Herman van Rompuy as President of the European Council became effective on the date of the entry into force of the Treaty of Lisbon. Also, article 6 of the Protocol on transitional provisions annexed to the Treaty of Lisbon provided that on the date of the entry into force of the Treaty, the terms of office of the High Representative for the common foreign and security policy and of the Deputy Secretary General of the Council ceased, with the Council electing a Secretary General. register.consilium.europa.euArchived March 7, 2012, at the Wayback Machine
"NASA's LCROSS Impacts Confirm Water in Lunar Crater" (Press release). NASA. November 13, 2009. Archived from the original on November 15, 2009. Retrieved November 21, 2009. Preliminary data from NASA's Lunar Crater Observation and Sensing Satellite, or LCROSS, indicates the mission successfully uncovered water in a permanently shadowed lunar crater.