Yawm al-Maktabah (Library Day) is observed in various Muslim communities to celebrate libraries, promote their use, and advocate for access to information resources. The date often aligns with World Book and Copyright Day (April 23rd) or local library observances. Libraries have held profound significance throughout Islamic civilization-from the great Bayt al-Hikmah (House of Wisdom) in Baghdad to the library of Cordoba housing hundreds of thousands of volumes, from Al-Azhar's collections to the Qarawiyyin's manuscripts. These institutions preserved knowledge, supported scholarship, and made learning accessible across the Muslim world. The Quran describes itself as preserved in "sheets (suhuf) honored, exalted, purified" (80:13-14), emphasizing the sanctity of written transmission. The Prophet (peace be upon him) encouraged writing and preserving knowledge. Yawm al-Maktabah promotes library use through open houses, membership drives, book displays, reading programs, and advocacy for library funding. It addresses challenges like library closures, budget cuts, digital transitions, and declining physical visitation. The day encourages supporting school, public, and academic libraries as community assets. It emphasizes that libraries preserve cultural heritage, provide equal access to information, support lifelong learning, and serve as community hubs. Yawm al-Maktabah reminds Muslims that libraries are heirs to a noble tradition, that knowledge accessibility is a communal responsibility, and that investing in libraries invests in future generations' intellectual and spiritual development.