Clayton County’s annual Festival of Trees and Lights opens Friday at the Clayton County International Park, with a 5:30 p.m. to 6 p.m. opening ceremony followed by the tree-lighting. There is no gate fee if you enter the park before 6 p.m. The festival runs through Dec. 16 from 6:30 p.m. to 9 p.m., with a light show Tuesdays through Thursdays and entertainment Fridays through Sundays. The festival runs through December. The festival features . Weekday rates: cars, $5; vans, $7; and buses, $15. Weekend: cars, $7; vans, $10; and buses, $20. The event is sponsored by the county parks and recreation department and The Rainbow House Inc. Details: 770-477-3766 or visit www.claytonparks.com