We celebrate Dewey Decimal System Day! It's observed annually on December 10th to honor Melvil Dewey, the creator of the Dewey Decimal Classification system, which revolutionized library organization. This day is a tribute to his contributions and the enduring impact of his system on libraries worldwide. Libraries often mark the occasion with special events, such as tours, book displays, and activities that highlight the importance of library organization and classification. It's a great opportunity for people to learn more about how libraries work and the history behind the Dewey Decimal System.