The World Space Week Association (WSWA) began promoting Spaceweek, a celebration of the first Moon landing, each July. In 1980, its celebration in Houston was led by Ernie Hillje, Troy Welch, David Koch, and Dennis Stone. They formed Spaceweek National Headquarters in 1981 to organize a nationwide celebration. Spaceweek spread to over 15 nations by 1999, when the UN General Assembly declared World Space Week.
Today, the World Space Week Association proudly supports the UN in the global coordination of World Space Week, each October 4–10.