World Space Week
Space exploration is humanity's greatest collective adventure.
About
World Space Week, observed October 4–10, is the world's largest annual space event, celebrated in over 80 countries with over 8,000 events. It brings together space agencies, astronomy clubs, schools, companies, and enthusiasts to educate people about space and celebrate space science and technology. October 4 marks the anniversary of Sputnik's launch in 1957, and October 10 the signing of the Outer Space Treaty in 1967.
History
The United Nations General Assembly declared World Space Week in 1999 to be held October 4–10 each year. The week spans two landmark space milestones: the October 4, 1957 launch of Sputnik 1 — humanity's first artificial satellite — and the October 10, 1967 signing of the Outer Space Treaty, which established that space is the province of all humanity.
Where It's Observed
Cultural Context
US United States
NASA's history, the Apollo moon landings, and private companies like SpaceX make the US the emotional centre of the space exploration narrative. World Space Week in the US features events at NASA facilities, science museums, and universities celebrating American space achievement.
KR South Korea
South Korea's growing space program — including the domestically developed Nuri rocket and lunar orbiter — has generated enormous national pride. World Space Week aligns with Korea's ambitions to be a major space-faring nation, and educational events inspire the next generation of Korean space scientists.
JP Japan
JAXA's remarkable missions — including the Hayabusa asteroid sample-return missions — have made Japan a respected space power. Japanese astronauts' appearances on the ISS generate major public interest. World Space Week events connect Japan's scientific achievements to public enthusiasm for space.
How to Participate
- 01Watch a live rocket launch via NASA, JAXA, or SpaceX streaming
- 02Visit a space museum or planetarium during the week
- 03Learn about a space mission currently underway
- 04Download NASA's Astronomy Picture of the Day app and explore the universe daily
Frequently asked questions
When is World Space Week?+
World Space Week is observed annually on October 4. The date is fixed each year — October 4 — and does not shift based on the lunar calendar or weekday.
What is World Space Week?+
World Space Week, observed October 4–10, is the world's largest annual space event, celebrated in over 80 countries with over 8,000 events. It brings together space agencies, astronomy clubs, schools, companies, and enthusiasts to educate people about space and celebrate space science and technology…
Is World Space Week a public holiday?+
World Space Week is an international observance or awareness day, not a public holiday in most countries. It does not typically result in days off work or school closures, though some countries and organisations hold official events.
How can I participate in World Space Week?+
Watch a live rocket launch via NASA, JAXA, or SpaceX streaming Visit a space museum or planetarium during the week Learn about a space mission currently underway These are some of the most accessible ways to engage with the day's purpose.
Which countries observe World Space Week?+
Global — 80+ countries, coordinated by UNOOSA.
Mark the date
Download a free printable calendar for 2026 and never miss World Space Week.