Whimsical illustration of people looking at the Moon.

Save the date for International Observe the Moon Night 2020

International Observe the Moon Night is a worldwide celebration of lunar science and exploration, celestial observation, and our cultural and personal connections to the Moon. One day each year, everyone on Earth is invited to observe, learn about, and celebrate the Moon together. Note that we encourage you to interpret 'observe' broadly.

This event occurs in September or October, when the Moon is around first quarter – a great phase for evening observing. Furthermore, the best lunar observing is typically along the Moon's terminator (the line between night and day) where shadows are the longest, rather than at full Moon.

You can participate by attending or hosting an International Observe the Moon Night event, or by registering as a lunar observer. Connect with fellow lunar enthusiasts around the world through our Facebook page, #ObserveTheMoon on your preferred social media platform, and the International Observe the Moon Night Flickr group.

2019 Event

Thank you for celebrating International Observe the Moon Night 2019. We had a record-breaking year, with 102 countries worldwide participating!

There were 2104 events and participants.

More About International Observe the Moon Night

International Observe the Moon Night has been held annually since 2010. Each year, thousands of people participate at museums, planetaria, schools, universities, observatories, parks, businesses, and backyards around the world. Everyone can participate. All you need to do is look up! Learning about and celebrating the Moon is even better. Every interested group or individual can host an event.

This is a time for libraries to feature Moon books, radio stations to play Moon songs, schools to unite around a common lunar theme in art, history, engineering, language, and science classes – everyone can explore the Moon from their own angle.

International Observe the Moon Night is sponsored by NASA’s Lunar Reconnaissance Orbiter mission and the Solar System Exploration Division at NASA’s Goddard Space Flight Center, with many contributing partners.

Plan Ahead

Upcoming dates for International Observe the Moon Night

  • September 26, 2020
  • October 16, 2021
  • October 1, 2022

Quick Links

Host an Event

Attend an Event

Moon Activities

Event Materials

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