Historical eventApril 281952

Treaty of San Francisco

The Treaty of San Francisco comes into effect, restoring Japanese sovereignty and ending its state of war with most of the Allies of World War II.

Everything on April 28Original source

In context

When
Monday, April 28 195274 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
20th century · 1950s
Recorded from
Wikipedia “On this day” feed

At a glance

Dates: From 1952.

What happened

The Treaty of San Francisco comes into effect, restoring Japanese sovereignty and ending its state of war with most of the Allies of World War II.

April 28 through the years

Other entries on the same calendar day, in order.

  1. 1952Treaty of San Francisco
  2. 1988Aloha Airlines Flight 243
  3. 1988Maui
  4. 1991Space Shuttle Discovery
  5. 1994Central Intelligence Agency
  6. 1996Spree killer
  7. 1996Whitewater controversy
  8. 1996Port Arthur massacre
  9. 1999Taber, Alberta
  10. 2004CBS News
  11. 2008Trump International Hotel and Tower (Chicago)

Also in 1952

  • September 12Flatwoods, West VirginiaThree boys in Flatwoods, West Virginia, U.S., reported seeing a ten-foot-tall (3 m) monster in the woods while investigating a UFO.
  • October 20Evelyn Baring, 1st Baron Howick of GlendaleThe Governor of Kenya Evelyn Baring declares a state of emergency and begins arresting hundreds of suspected leaders of the Mau Mau Upris…
  • November 51952 Severo-Kurilsk earthquakeAn earthquake struck the Kamchatka Peninsula, triggering a major tsunami that affected the Kuril Islands and other parts of the Pacific O…
  • June 17Guatemalan RevolutionGuatemalan Revolution: The Guatemalan Congress passed Decree 900, redistributing unused land greater than 224 acres (0.91 km2) in area to…
  • June 17Decree 900Guatemala passes Decree 900, ordering the redistribution of uncultivated land.
  • October 3Operation HurricaneThe United Kingdom successfully conducted its first nuclear test, becoming the world's third state with nuclear weapons.
  • May 18First Indochina WarFirst Indochina War: Viet Minh forces overran a French and Laotian garrison at Muong Khoua, leaving only four survivors.
  • September 6Farnborough Airshow crashA prototype aircraft crashed at the Farnborough Airshow in Hampshire, England, killing the pilot and test observer on board, and 29 spect…

Everything we record for 1952 →

Sources

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“Treaty of San Francisco”, What's On This Date, https://whatsonthisdate.com/app/event/treaty-of-san-francisco-1952-april-28, accessed October 29, 2026.

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Questions about this entry

When did Treaty of San Francisco happen?

April 28 1952 — 74 years ago, on a Monday.

Where does this text come from?

Wikipedia “On this day” feed. Summaries are short adaptations that link back to the source, not reprints.

How do I cite this page?

Use the ready-made citation near the sources at the bottom of the page, and follow the source link to cite the underlying record as well.

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