This is a list of selected May 15 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 or picture of the day.
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May 15: Armed Forces Day in the United States (2010); Independence Day in Paraguay; Teachers' Day in Mexico and South Korea; Nakba Day in Palestinian communities
- 1602 – English explorer Bartholomew Gosnold became the first recorded European to visit Cape Cod.
- 1836 – English astronomer Francis Baily first observed "Baily's beads", a phenomenon during a solar eclipse in which the rugged lunar limb topography allows beads of light to shine through (example pictured).
- 1905 – Las Vegas was established as railroad town, after 110 acres (0.45 km2) owned by the San Pedro, Los Angeles and Salt Lake Railroad was auctioned off.
- 1928 – Mickey and Minnie Mouse made their film debut in the animated cartoon Plane Crazy.
- 1932 – Japanese Prime Minister Inukai Tsuyoshi was assassinated in a coup attempt by radical elements of the Imperial Japanese Navy.
- 1966 – After a policy dispute, South Vietnamese Prime Minister Nguyễn Cao Kỳ's ruling junta launched a military attack on the forces of General Ton That Dinh, forcing him to abandon his command.