This special holiday, in which the Houston Arboretum celebrates the beauty, benefits and care of trees, is especially important to the Arboretum because of the responsibility as an urban nature sanctuary in the center of Houston. This family event features tons of activities for children and adults alike: A visit from "Johnny Appleseed," stations for making crafts like pineconde birdfeeders, live owls from Wildlife Center of Texas, reptiles and other critters from the Texas Wildlife Rehabilitation Coalition, professional advice from a tree expert and a sale of a selection of native plants.

As part of the celebration, the Houston Bar Association's Lawyers against Waste Committee is planting 1,000 trees in Memorial Park, and is looking for 250 volunteers to help plant all those 5-gallon trees in one day. Two-hour shifts run from 9 a.m. to 4 p.m. Volunteers will be provided instruction on how to plant a tree and refreshments. Sign up here, using password HBA1000.