All Day

International Observe the Moon Night 2025

Worldwide

For observation, appreciation, understanding of the Moon / its connection to planetary science / exploration; 1st quarter Moon is best time due to shallow angle of sunlight that illuminates details.

NASA Space Apps Challenge

Worldwide

48-hour hackathon in French and English for space enthusiasts, programmers, designers, engineers, entrepreneurs and students; 2800+ local events and online

World Space Week

Worldwide

Celebrating international contributions of space science for betterment of the human condition; Oct 4 is 68th observation of 1st Space mission Sputnik One launched by Soviet Union 1957; Oct 10 is 58th observation of Outer Space Treaty going into effect 1967.

Ongoing