Abdication of Margrethe II of Denmark Margrethe II of Denmark announces her abdication during her New Year's Eve address on television.
Afghan conflict Taliban defense minister Mullah Yaqoob says that security forces have killed and arrested several militants from Tajikistan and Pakistan who are accused of multiple attacks in Afghanistan.
2023 Israel–Hamas war Ten Houthi militants are killed during an engagement between four Houthi boats and United States Navy helicopters defending the freighter Maersk Hangzhou in the Red Sea.
Russo-Ukrainian War Russian forces bombard the city of Kharkiv. According to Ukrainian authorities, this resulted in 26 people being injured and numerous residential buildings being destroyed in the city center. The Ukrainian Air Force reports shooting down 21 out of 49 attacking drones.