National Fossil Day is observed in the United States every year on the second Wednesday of October, promoting the educational and scientific values of fossils. Established during Earth Science Week in 2010, this event is organized by the American Geosciences Institute, with support from the National Park Service and over 270 partners, including museums and institutions. Activities across the country allow the public to learn more about fossil heritage, which provides insights into the planet's past and extinct species. Each year, a new logo is created to celebrate the day, unveiled in mid-January, highlighting an interesting story related to the fossil record. The observance emphasizes the importance of fossils, which must be at least 10,000 years old to be classified as such.