April 2026 in the United States

Artemis II was a crewed flyby of the Moon. It was the first crewed flight of the NASA-led Artemis program and the first crewed flight beyond low Earth orbit since Apollo 17 in 1972. Artemis II was the second flight of the Space Launch System (SLS) and the first crewed flight of the Orion spacecraft, named Integrity by the four-person crew.

On 8 April 2026, the United States and Iran agreed to a two-week ceasefire in the 2026 Iran war, mediated by Pakistan. Iran had rejected the draft proposal for a 45-day two-phased ceasefire framework introduced on 5 April by Pakistan, instead proposing its own 10-point plan for a peace agreement. The proposal was developed as part of ongoing mediation efforts involving regional and international actors during the 2025–2026 negotiations. Since its declaration, the ceasefire has been violated by both sides. On 21 April, President Trump said that he extended the Iran truce to allow time for an Iranian proposal to be submitted at Pakistan's request. On April 22, US officials said that Trump has given Iran three to five days to engage in negotiations and resolve alleged infighting within the government before resuming attacks.

Coachella 2026 was a music and arts festival that took place in Empire Polo Club, Indio, California, from April 10 to 19, 2026. It was the 25th edition of the festival. The scheduled headlining performers were Sabrina Carpenter, Justin Bieber, and Karol G. It sold out within a week of its announcement.