This is a list of selected April 30 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Before doing so, please review the selected anniversaries guidelines. If your suggestion is potentially controversial or relates to a day currently or soon to appear on the Main Page, post it on the talk page instead.
Please note:
- Events listed on the Main Page are selected based on article quality and to provide a diverse range of topics, rather than solely on the importance or significance of the events.
- Only four or five events are featured each day; therefore, not all important or significant events can be included.
- An event is generally excluded if it is already the subject of the scheduled featured article, featured list or picture of the day.
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April 30: Arbor Day in the United States (2010); National Persian Gulf Day in Iran; Queen's Day in the Netherlands; Walpurgis Night in various European countries; Reunification Day in Vietnam
- 1006 – SN 1006, the brightest supernova in history, first appeared in the constellation Lupus, and was then seen by observers in Switzerland, Egypt, China, Japan, and possibly North America within the next day.
- 1789 – George Washington (pictured) took the oath of office as the first President of the United States at Federal Hall in New York City.
- 1945 – World War II: As Allied forces were closing in on Berlin, Adolf Hitler and Eva Braun committed suicide in the Führerbunker after being married for one day.
- 1948 – Twenty-one countries signed a charter in Bogotá, Colombia, establishing the Organization of American States.
- 1975 – North Vietnamese troops captured Saigon shortly after American forces ended its helicopter evacuation of U.S. citizens, South Vietnamese civilians and third country nationals from the city, ending the Vietnam War with the unconditional surrender of South Vietnam.