Historical eventSeptember 51905

Theodore Roosevelt

Under the mediation of U.S. president Theodore Roosevelt, the Russo-Japanese War officially ended with the signing of a treaty at the Portsmouth Naval Shipyard in Maine.

Everything on September 5Original source

In context

When
Tuesday, September 5 1905121 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
20th century · 1900s
Recorded from
Wikipedia “On this day” feed

Russia, Greece and some other countries used the Julian calendar into the early 20th century, so local records may show a date up to 13 days earlier.

At a glance

Dates: From 1905.

What happened

Theodore Roosevelt Jr. was the 26th president of the United States, serving from 1901 to 1909. Previously serving for six months as vice president under William McKinley, Roosevelt became president after McKinley's assassination in 1901. He was 42 years old upon his first inauguration, making him the youngest person to hold the office.

September 5 through the years

Other entries on the same calendar day, in order.

  1. 1905Theodore Roosevelt
  2. 1990Sri Lankan civil war
  3. 1991Indigenous and Tribal Peoples Convention, 1989
  4. 1996Hurricane Fran
  5. 2005Mandala Airlines Flight 091
  6. 2006Waziristan Accord
  7. 20122012 Afyonkarahisar arsenal explosion
  8. 20202020 California wildfires
  9. 2021Alpha Condé
  10. 20222022 Luding earthquake
  11. 2022Liz Truss

Also in 1905

  • May 22Abdul Hamid IISultan Abdul Hamid II established the Ullah millet, a separate millet for the Aromanians within the Ottoman Empire.
  • January 16Ice hockeyDespite being blind in one eye, ice hockey player Frank McGee (pictured) set the record for most goals in a Stanley Cup game when he scor…
  • October 16British RajAuthorities of the British Raj partitioned the Bengal Presidency, separating the largely Muslim eastern areas from the largely Hindu west…
  • October 26Saint Petersburg SovietThe Saint Petersburg Soviet held its first meeting, becoming the first elected body in Russia to represent workers.
  • December 4Great Seimas of VilniusThe Great Seimas of Vilnius met to discuss national concerns within Lithuania: they decided to demand wide political autonomy within the…
  • August 19Albert Grey, 4th Earl GreyIn a ceremony officiated by Albert Grey, 4th Earl Grey, The Luck of Cumberland (pictured) was presented to HMS Cumberland.
  • January 26Carat (mass)The 3,106-carat (621 g) Cullinan Diamond (pictured), the largest gem-quality rough diamond ever found, was discovered at the Premier Mine…
  • June 27Russian Revolution of 1905First Russian Revolution: The crew of the Russian battleship Potemkin began a mutiny against their officers.

Everything we record for 1905 →

Sources

Cite this page

“Theodore Roosevelt”, What's On This Date, https://whatsonthisdate.com/app/event/theodore-roosevelt-1905-september-5, accessed October 28, 2026.

Cite the underlying source as well — the source links above go to the record this entry is adapted from.

Questions about this entry

When did Theodore Roosevelt happen?

September 5 1905 — 121 years ago, on a Tuesday.

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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