A child’s second birthday, for many, is a big to-do for the little one’s family and friends.If the milestone involves the families and close associates of 526 individuals, the event becomes a grand celebration.Such is the case for Great Valley Academy on Button Avenue in Manteca. The charter school is marking its second graduation ceremony for its eighth graders on Wednesday, June 5, at 6:30 p.m. in the school auditorium.But that’s not the only school year-end celebration on tap for the campus located on the Highway 99 Frontage Road north of East Highway 120. On Friday, May 3, the entire school – from the school principal to all the staff, teachers and K-8 graders – will be enjoying what is turning out to be an annual tradition, a 1950s BBQ party al fresco complete with all the visual ambience of that era.