Computer Security Day2026 · Date · History
University cybersecurity guidance identifies Computer Security Day as an annual November 30 observance dating to 1988.
About Computer Security Day
Computer Security Day is observed on November 30 as a practical reminder to protect devices, accounts and information. The University of Ottawa recognizes it annually and dates the awareness tradition to 1988.
It is an informal international awareness observance, not a government-mandated public holiday or a reason to install unfamiliar software.
Why Computer Security Day matters
The day encourages everyday security habits: reliable updates, strong unique passwords, multifactor authentication and appropriate backups.
Security steps should fit the user’s environment and workplace policies; no single checklist eliminates every risk.
History of Computer Security Day
A historical account from Network World identifies the Washington, D.C. chapter of the Association for Computing Machinery’s SIGSAC as the group that started Computer Security Day in 1988.
That account links the November 30 timing to keeping security visible during the holiday season. A university first-party guide corroborates the annual date and the 1988 origin; it does not make the day a legal holiday.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
Washington, D.C. chapter of ACM Special Interest Group on Security, Audit, and Control (SIGSAC)
Historical 2004 industry account names this chapter as initiating the 1988 observance.
First documented observance
University of Ottawa and the 2004 historical industry account corroborate 1988; precise initial program details are unverified.
What the evidence establishes
Confirmed institutional roles and milestones are shown first. Details that could not be established from the reviewed sources are listed separately below.
6 fields not established in reviewed sources
Also known as
National Computer Security Day
How to Observe Computer Security Day
Install security updates using your device’s built-in or organization-approved channels.
Enable multifactor authentication on important accounts and use unique passwords or an appropriate password manager.
Review your backup and recovery arrangements without exposing confidential documents.
Pause before opening unexpected attachments, QR codes or login links; report suspected phishing through official support channels.
Computer Security Day Facts
Date: November 30.
Informal awareness tradition traced to 1988.
Network World identifies Washington, D.C. ACM SIGSAC chapter as the initiator.
No general public holiday status is established.
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
- Health Information Not Medical Advice.
Evidence & sources
Sources used across the guide are gathered here. Labels show how each source supports the page, and contextual references are kept separate from primary evidence.
Network World — Computer Security Day historical account (2004) (opens in a new tab)
Primary Institutional Evidence
University of Ottawa — Computer Security Day (opens in a new tab)
University Information Security
University of Ottawa — Security awareness guidelines (opens in a new tab)
Primary Institutional Evidence
Understand it, compare it, then explore further
Start with the most common factual questions, then compare closely related observances and explore useful connections.
Frequently asked questions
When is Computer Security Day?
30 November The documented recurrence rule is: 30 November.
Does Computer Security Day fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is Computer Security Day an official public holiday?
The reviewed sources verify it within this scope: International/institutional cybersecurity-awareness tradition. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when reliable evidence explicitly does so.
Who established or recognizes Computer Security Day?
The documented basis is: University cybersecurity guidance identifies Computer Security Day as an annual November 30 observance dating to 1988.. Supporting evidence includes University of Ottawa — Computer Security Day. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is Computer Security Day international or country-specific?
The documented scope is international or global: International/institutional cybersecurity-awareness tradition. That does not mean every country treats the date as a public holiday or observes it in the same way.
How is this page verified?
The factual information is checked against reviewed sources, including the date pattern, scope and institutional history. This page was checked on 2026-10-08.
When is Computer Security Day?
November 30 each year.
Who started Computer Security Day?
A historical account identifies the Washington, D.C. chapter of ACM SIGSAC in 1988.
Is it a statutory holiday?
No. It is an awareness observance, not a universal statutory holiday.
What is a safe way to participate?
Use official updates, unique passwords, multifactor authentication and well-managed backups.
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