In 1982, the International Council on Monuments and Sites (ICOMOS) proposed to the UNESCO to launch an International Day for Monuments and Sites. This day was approved a year later, in 1983, and International Day for Monuments and Sites has been celebrated since on every April 18th.
According to UNESCO, the aim of this day is to “explore cultural heritage… and to encourage local communities and individuals to consider the importance of cultural heritage to their lives, identities, and communities.”
Every year the International Day for Monuments and Sites holds a theme. The theme last year, 2011, was Cultural Heritage of Water. This year’s theme, World Heritage and Sustainable Development: the Role of Local Communities, marks the 40th anniversary of the UNESCO World Heritage Convention.
Other Significant Days in April: