On this day you can enjoy old rocks and fossils. You can also enjoy a rock collection. If you wish you can also go in for a field trip where you can search for old fossils. Or, if you choose, you can just enjoy playing with old rocks. Fossils, Jewelry stones and Coal all are considered old rocks. You can celebrate any or all of these old rocks today. You can enjoy this day with your friends by going for a field trip and looking at the old rocks and playing on them. You can enjoy this day by wearing a wristband in your hand.