World Heritage Day, officially known as the International Day for Monuments and Sites, is observed annually on April 18. Established by ICOMOS (International Council on Monuments and Sites) in 1982 and later approved by UNESCO, the day promotes awareness of cultural heritage worldwide. It highlights the importance of preserving historical landmarks, monuments, and sites for future generations. Events such as guided tours, educational programs, and restoration initiatives are held globally to celebrate the diversity of heritage and encourage efforts to protect it from threats like neglect, climate change, and urbanization.