Celebrated on 11/30/2026
Computer Security Day, celebrated annually on November 30, was created in 1988 by the Association for Computing Machinery (ACM) to raise awareness about cybersecurity. It coincides with the first computer virus outbreak, the Morris Worm, which infected about 6,000 computers in 1988.
Computer Security Day was established in 1988 by the Association for Computing Machinery (ACM) to promote awareness of computer security and encourage best practices among individuals and organizations. The date, November 30, was chosen to highlight the importance of security during the holiday shopping season when cyber threats increase. The initiative was a response to growing concerns about digital vulnerabilities, notably catalyzed by the Morris Worm incident that same year, which infected thousands of computers and underscored the need for robust security measures.
Over the years, Computer Security Day has evolved from a niche observance into a global event, with participation from cybersecurity firms, educational institutions, and government agencies. Modern celebrations include workshops, webinars, and social media campaigns that educate the public on topics like password hygiene, phishing prevention, and software updates. The day also serves as a reminder for individuals and businesses to review their security policies and update software. In recent years, it has become a platform to highlight emerging threats such as ransomware and IoT vulnerabilities.
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