International Monument Day 2024. Cultural and natural heritage sites adapt to new climatic,. April 18th is the international day of monuments and sites (idms), established in 1982 by icomos (international council on monuments and sites), followed by its adoption by.

On april 18, it’s the world heritage day, or international day for monuments and sites. April 18th is the international day of monuments and sites (idms), established in 1982 by icomos (international council on monuments and sites), followed by its adoption by.