The Lawrence County Civic Center building in Monticello turns 100 years old this year, the same year America celebrates its 250th birthday. To celebrate both events, the Center will host a birthday party on July 7 at 6 p.m. The party is sponsored by the Mississippi Humanities Council and the America 250 Mississippi Committee. The groups awarded the Civic Center with a grant of $2,595 toward the cost. The event is free to the public, but tickets…