October 13 is National Fossil Day, according to the U.S. National Park Service. It’s an under-celebrated event, IMO. Want to join the fun? Here’s how:

1. Put together a dinosaur Halloween costume. I mean really, who doesn’t want to be a T. rex? Don’t forget to wave your hands and practice your roar.
2. Go local with this interactive database and map to find out what ancient creatures lived near you. I bet it’s something totally cool.
3. Take a for-real or virtual trip to a natural history museum or other attraction. Here’s a few.
4. Gawk at sketches of fabulous discoveries like:

• Carnotaurus: a horned relative of T. rex that hung out in Patagonia.
• Australotitan cooperensis, the biggest dinosaur ever found in…well, I think you figured out where.
• Everybody’s favorite armored ankylosaurs including this “newcomer” from prehistoric Morocco.

5. Do some bird watching. Yes, birds are avian theropods and thus the descendants of one line of dinosaurs.
6. Find still more fun ways to celebrate the day with paleontologists, educators and students.
7. Bonus idea: Read about the hunt for dinosaur DNA remnants in wonderfully preserved fossils from China dating to 125 million years ago.