The United Nations General Assembly declared in 1999 that World Space Week (WSW) will be held each year from October 4-10. The dates were in recognition of the October 4, 1957 launch of the first human-made Earth satellite, Sputnik 1, thus opening the way for space exploration and the October 10, 1967 signing of the Treaty on Principles Governing the Activities of States in the Exploration and Peaceful Uses of Outer Space, including the Moon and Other Celestial Bodies.
World Space Week is an international celebration of science and technology, and their contribution to the betterment of the human condition. World Space Week aims to:
During World Space Week space education and outreach events are organised by space agencies, aerospace companies, schools, planetaria, museums, and astronomy clubs around the world.
In 2013, World Space Week reached new levels with 1,400 events (nearly double that of prior year) in 80 nations
World Space Week is coordinated by the United Nations with the support of the World Space Week Association (WSWA). The WSWA leads a global team of National Coordinators, who promote the celebration of World Space Week within their own countries. The Association also holds a Permanent Observer position in the United Nations Committee on the Peaceful Uses of Outer Space, where the results of World Space Week are reported back every year.
This year, the World Space Week Association have selected selected "Discovery" as a theme for WSW.
""Discovery" is an outward looking theme, celebrating deep space exploration. It means to highlight missions like ESA Gaia, Kepler, Herschel, Hubble, etc. and emphasizes discoveries...".
See more at World Space Week Association