Whimsical illustration of people looking at the Moon.

International Observe the Moon Night is a worldwide celebration of lunar science and exploration held annually since 2010. One day each year, everyone on Earth is invited to observe and learn about the Moon together, and to celebrate the cultural and personal connections we all have with our nearest neighbor.

The event occurs in September or October, when the Moon is around first quarter. A first quarter Moon is visible in the afternoon and evening, a convenient time for most hosts and participants. Furthermore, the best lunar observing is typically along the dusk/dawn terminator, where shadows are the longest, rather than at full Moon.

2019 Event

Registration is not yet open for 2019.

Apollo 50th Anniversary

1969 marks the first time humans walked on the Moon with Apollo 11. The anniversary presents an opportunity to discuss past, present, and future lunar and planetary science and exploration and to celebrate all of the people who participated and shared in this human triumph.

About the Event

International Observe the Moon Night is an annual worldwide public event that encourages observation and appreciation of the Moon. All are invited to observe the Moon, learn about NASA planetary science and exploration, and celebrate cultural and personal connections to our nearest neighbor. Each year, thousands of people participate at museums, planetaria, schools, universities, observatories, parks, businesses, and backyards around the world. Anyone can participate. All you need to do is look up! Any astronomy club, interested group, or individual can host an event; events range from small family gatherings to community events that draw hundreds of visitors!

Plan Ahead

Upcoming dates for International Observe the Moon Night

  • October 5, 2019
  • September 26, 2020
  • October 16, 2021

Quick Links

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Event Materials

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