CHARLOTTE – You know summer has fully arrived when fresh North Carolina (N.C.) watermelons are on the market. To celebrate these seasonal favorites, the Charlotte Regional Farmers Market will host Watermelon Day Friday, Aug. 11, from 11 a.m. to 1 p.m. Visitors will be treated to free watermelon samples, giveaways and recipes. They can also enjoy scavenger hunts, take their …