Historical eventOctober 52021

Windows 11

Windows 11 is released to the general public.

5th anniversary in 2026

Everything on October 5Original source

In context

When
Tuesday, October 5 20215 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
21st century · 2020s
Anniversary
5th in 2026
Recorded from
Wikipedia “On this day” feed

At a glance

Dates: From 2021.

What happened

Windows 11 is the current major release of Microsoft's Windows NT operating system, released on October 5, 2021, as the successor to Windows 10 (2015). It is available as a free upgrade for devices running Windows 10 that meet its system requirements. The Windows Server counterpart, Windows Server 2025, was released in 2024. It is the first major version of Windows without a corresponding mobile edition, following the end of support for Windows 10 Mobile,

October 5 through the years

Other entries on the same calendar day, in order.

  1. 1988Lloyd Bentsen
  2. 1988Augusto Pinochet
  3. 1990The Herald (Melbourne)
  4. 19911991 Jakarta Indonesian Air Force C-130 crash
  5. 1994Order of the Solar Temple
  6. 1999Ladbroke Grove rail crash
  7. 2000Overthrow of Slobodan Milošević
  8. 2000Colour revolution
  9. 2011Mekong River massacre
  10. 2014Jules Bianchi
  11. 2021Windows 11

Also in 2021

  • March 14TatmadawThe Burmese military and police forces killed at least 65 civilians during the Hlaingthaya massacre in Yangon, including those protesting…
  • March 14Hlaingthaya massacreBurmese security forces kill at least 65 civilians in the Hlaingthaya massacre.
  • September 12Siberian Light Aviation Flight 51Siberian Light Aviation Flight 51 crashes short of the runway at Kazachinskoye Airport, killing four.
  • September 162021 Luxian earthquakeA 6.0 Mw earthquake strikes Lu County, Sichuan, China, killing three and injuring more than 88.
  • September 16Inspiration4Inspiration4, the first private orbital crewed spaceflight, is launched from the Kennedy Space Center.
  • September 5Alpha CondéThe President of Guinea, Alpha Condé is captured by armed forces during a coup d'état.
  • August 142021 Haiti earthquakeA magnitude 7.2 earthquake struck in Haiti, killing at least 2,248 people and causing $1.5 billion in damages and economic loss.
  • November 5Astroworld Festival crowd crushThe Astroworld Festival crowd crush results in 10 deaths and 25 people being hospitalized

Everything we record for 2021 →

Sources

Cite this page

“Windows 11”, What's On This Date, https://whatsonthisdate.com/app/event/windows-11-2021-october-5, accessed October 27, 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 Windows 11 happen?

October 5 2021 — 5 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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