Astronomy Day and National Public Lands Day Sep 27, 2025

When the calendar lines up just right, you get a rare double feature: National Public Lands Day and Astronomy Day. It"s a chance to explore the landscapes that ground us and the skies that inspire us—all within 24 hours.

© Austin Trigg/TANDEM Stills + Motion

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Today in History

Sep 27, 2018High seas commerce
Sep 27, 2019Ancient storage in the Grand Canyon
Sep 27, 2020Take me to the river
Sep 27, 2021Sharp-dressed bug
Sep 27, 2022Upper Geyser Basin, Yellowstone National Park
Sep 27, 2023Via Krupp, Capri, Italy
Sep 27, 2024Basilica of Santa Maria della Salute, Venice, Italy
Sep 27, 2026Decorator crab on a sea pen, Komodo National Park, Indonesia

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Nov 5, 2019Balloons and camels are two ways to catch a ride here
Nov 1, 2026Native American Heritage Month
Feb 21, 2020Carnival comes to Olinda
Apr 3, 2023National Find a Rainbow Day
May 13, 2023World Migratory Bird Day
Mar 30, 2021Best fronds forever
Mar 23, 2019What happened to these clouds?
May 8, 2020Victory in Europe, 75 years ago
Mar 23, 2023World Meteorological Day
Sep 24, 2020Till the cows come home
Sep 11, 2023Patriot Day
Aug 9, 2023International Day of the Worlds Indigenous Peoples
Dec 11, 2024International Mountain Day
Mar 11, 2024National Napping Day
Sep 23, 2025A keel-billed toucan in Costa Rica
May 19, 2025Mount Hamilton, near San Jose, California
Jan 15, 2019A personal collection becomes an institution
Dec 31, 2018A new tradition in London
Mar 18, 2025Rock formations at Sedona, Arizona
Sep 5, 2020Beaver achievers
Oct 7, 2024Elbphilharmonie concert hall in Hamburg, Germany
Nov 11, 2021Veterans Day
Mar 29, 2026Peggys Point Lighthouse, Atlantic Coast, Nova Scotia, Canada
Aug 6, 2024Molokini Crater, Maui, Hawaii
May 15, 2018Celebrating the UN’s International Day of Families
Mar 24, 2018Crimson-rumped toucanet in the Refugio Paz de Las Aves, Ecuador
Dec 28, 2025Anniversary of the Endangered Species Act of 1973
Jun 3, 2024World Bicycle Day
May 26, 2025Memorial Day