68 saved#2,936 of 6,224

National Computer Security Day

Protect your data and stay safe online - join us in celebrating National Computer Security Day with tips and tricks for better security!

Monday

November 2026

Last updated February 7, 2026 · by the Holiday Calendar Team

Have an update or spot an error?

YEARLY DATENovember 30

OBSERVED INUnited States

CATEGORYTech

SUBCATEGORYCybersecurity

INTRO

Introduction

PHOTO

Celebrate National Computer Security Day on November 30th and take the time to ensure your devices are protected! This special day was established in 1988, when the world first began to recognize the importance of computer security. Now more than ever, it's crucial that we all stay informed about online safety measures. So let's get ready for a day devoted to improving our cyber defenses against threats like data breaches and viruses!

TIMELINE

National Computer Security Day Timeline

First Computer Virus

The Creeper virus, often cited as the first computer virus, emerges, highlighting the need for computer security.

Inception of Internet

The Internet, initially a project of the US Department of Defense, goes global, marking the onset of opportunities and threats in the digital realm.

Establishment of Computer Security Day

The Association for Computer Security launched National Computer Security Day to raise awareness about the importance of computer security.

Adoption of SSL Protocol

Netscape Communications creates SSL (Secure Sockets Layer) to ensure secure transactions over the Internet, becoming a standard protocol for security and privacy.

The Snowden Reveal

Edward Snowden releases classified NSA documents, further highlighting the importance of online privacy and computer security.

Continued Cybersecurity Threats

Despite advancements in technologies, cybersecurity threats continue to adapt and evolve, reinforcing why National Computer Security Day remains as crucial as ever.

GET INVOLVED

How to Celebrate National Computer Security Day

Update your software

Updating your software regularly is the best way to ensure your computer's security. Be sure to check for updates on a regular basis and install any available updates.

INSTALL

Install a security suite

Installing an antivirus and firewall can help protect your computer from malicious attacks. Be sure to choose a suite that offers real-time protection and frequent updates.

BACK

Back up data

Creating backups of your data is important in case of a virus or other attack. You should back up your data at least once a week, or even more frequently if you have important files.

EDUCATE

Educate yourself

Take some time to learn about computer security, how to recognize malicious websites, how to spot phishing emails, and how to protect yourself online.

SECURE

Secure your Wi-Fi network

Be sure to secure your home Wi-Fi network with strong passwords and encryption protocols like WPA2. This will help keep unwanted visitors from accessing your data or using your connection.

WHY THIS DAY MATTERS

Why National Computer Security Day is Important

Makes the internet a safer place

When everyone follows basic security principles, it makes the Internet a much safer place for all of us. The more secure computers we have, the fewer opportunities there are for hackers or criminals to exploit vulnerabilities in our systems - meaning that everyone benefits from taking computer security seriously!

Protects your data

National Computer Security Day reminds us to take measures to protect our online data. This includes setting up strong passwords, enabling two-factor authentication, and keeping software and operating systems up to date.

Prevents cyber attacks

By practicing good cybersecurity practices, we can help prevent cyber attacks and other malicious activities. These include malware, viruses, phishing attempts and more - all of which can have a devastating impact on businesses or individuals if they're not properly protected.