Armed conflicts and attacks

• 2026 Iran war
  • 2026 Strait of Hormuz crisis
    • 2026 Strait of Hormuz campaign
      • The United Nation's International Maritime Organization announces a evacuation plan for around 500 to 600 ships with 11,000 seafarers stranded in the Gulf to sail through the Strait of Hormuz after the United States and Iran have reached a ceasefire deal to end the war. The evacuation will be coordinated in cooperation with Iran and Oman. (Middle East Eye) (The Maritime Executive)
    • The Bangladesh Shipping Corporation reports that the Bangladesh-flagged DWT bulk carrier vessel MV Banglar Joyjatra has cleared through the Strait of Hormuz at 3:00am BST after it was stranded in the region for 4.5 months. (The Business Standard) (New Age BD)
  • 2026 United States F-15E rescue operation in Iran
    • Two sources tell CNN that a pilot on a United States Armed Forces F-15E Strike Eagle, which was downed over Iran during the beginning of April, reported a jellyfish-like formation from Iranian drones before the jet was shot down. (CNN)
• Sudanese civil war
  • 2026 Blue Nile campaign
    • The Sudanese army launches a offensive in the Geissan District of Sudan's Blue Nile region, capturing a key rebel stronghold near Ethiopia–Sudan border. (Sudan Tribune)
  • Kordofan campaign
    • The United Kingdom and a group of European Union allies (France, Germany, the Netherlands, Ireland, Italy, and Norway) calls for an immediate halt to escalating violence by the Rapid Support Forces in North Kordofan's El-Obeid. (AA)
• Communal conflicts in Nigeria
  • Nigerian police report that at least 20 people were killed in an attack on a community in Bokkos, Plateau State, over the weekend. Police and other security agencies engaged the assailants in a shootout before they withdrew from the area. (Reuters)

Health and environment

• 2026 European heatwaves
  • French sports minister Marina Ferrari reports that at least 40 people have drowned in France while swimming in unsupervised areas over the weekend during a heat wave. (AFP and Reuters via Al Jazeera)

International relations

• North Korea–South Korea relations, North Korean involvement in the Russo-Ukrainian war, Prisoners of war in the Russo-Ukrainian war
  • South Korea announces that it will accept any North Korean prisoners of war captured by Ukraine while fighting for Russia if they choose resettlement in South Korea. South Korea also opposes any repatriation of such prisoners against their wishes. (Reuters)

June 23: Grand Duke's Official Birthday in Luxembourg

• 1726 – On the First Sunday after Trinity, J. S. Bach led the first performance of Brich dem Hungrigen dein Brot, BWV 39 (page pictured), one of a few new cantatas written that year.
• 1865 – Stand Watie became the last Confederate general of the American Civil War to surrender to Union forces.
• 1887 – The Parliament of Canada passed the Rocky Mountains Park Act, creating Banff National Park in Alberta as the country's first national park.
• 1926 – The College Board administered the first Scholastic Aptitude Test, a major standardized test for university and college admissions in the United States.
• 1991 – The first instalment of the video-game series Sonic the Hedgehog was released in North America.