Overview
April 12 is the 102nd day of the year (103rd in leap years) in the Gregorian calendar. In a common year there are 263 days remaining after April 12. In the Northern Hemisphere the date falls in mid-spring; in the Southern Hemisphere it appears in mid-autumn. Astrologically it lies within the sign of Aries.
Historical highlights
Several events of international importance occurred on April 12. These moments are often cited in histories of politics and science and are commemorated in different countries and communities.
- April 12, 1861: Opening hostilities of the American Civil War at Fort Sumter are widely marked as the start of that conflict.
- April 12, 1945: U.S. President Franklin D. Roosevelt died while serving his fourth term, an event that changed wartime leadership.
- April 12, 1961: The first human orbital flight was achieved, a milestone that launched a new era of crewed space exploration.
- April 12, 1981: The first flight of the U.S. Space Shuttle marked the start of a reusable spacecraft program with long-term influence on orbital operations.
Observances and importance
April 12 is celebrated by space agencies, educational groups and the general public. In several countries it is remembered as a day honoring human spaceflight and cosmonaut achievements. Popular observances include public lectures, museum events and informal gatherings known as Yuri's Night, which combine outreach with celebration of human ventures into space.
Notable facts and distinctions
Beyond its space associations, April 12 serves as a point for varied anniversaries, births and deaths across centuries. Its placement in the second week of April means it sometimes coincides with movable religious observances such as Easter, depending on the year. The date is a recurring marker used by calendars, historians and cultural groups to anchor events in the spring season.