# UN577-78 - 1990 United Nations 45th Anniversary
These stamps commemorate the 45th anniversary of the signing of the United Nations Charter. Since 1955, it has been the tradition of the United Nations Postal Administration to honor the anniversary of the U.N. every five years with a special commemorative stamp issue. The years since 1945 have seen vast changes throughout the world, which have presented new challenges for the United Nations.
These stamps commemorate the 45th anniversary of the signing of the United Nations Charter. Since 1955, it has been the tradition of the United Nations Postal Administration to honor the anniversary of the U.N. every five years with a special commemorative stamp issue. The years since 1945 have seen vast changes throughout the world, which have presented new challenges for the United Nations.