April 30, 2010 (El Cajon)—The City of El Cajon invites the public to its 13th year of receiving the Tree City USA award and the 21st Annual Arbor Day ceremony. Festivities will begin at 3:00 p.m., next to the Ronald Reagan Community Center, located at 195 East Main Street. In celebration of Arbor Day, over 125 trees will be planted at El Cajon Parks, public grounds, parkways and schools.