[单选] Arbor Day 植树节 In America， people celebrate Arbor Day in April． This annual holiday encourages people to plant and care for trees． I received a tree seedling on Arbor Day when I was 7 years old． My parents helped me plant the little tree in our front yard． I was so proud of it! 25 years later ，I am still proud when I see it! Now it"s a tall tree． America isn"t the only country to have a national tree planting day． In Korea and other countries， people hold a national tree planting festival．I．Read and judge．阅读短文，判断正（T）误（）．1．American Arbor Day is in April．