World Backup Day is an unofficial holiday observed worldwide every March 31. This day aims to promote the importance of information security and the practice of backing up data. It encourages individuals to create copies of essential data, such as emails, documents, videos, and family photos, on external storage devices or in the cloud, ensuring that lost data can be recovered in case of computer damage. The observance was proposed by users of the social networking service Reddit, with the date chosen strategically as it precedes April 1, a day commonly associated with data-erasing viruses. March 31 serves as a reminder to prioritize data protection, making it an ideal occasion for those who have never backed up their information to start doing so.