In a large mixing bowl, combine the softened cream cheese and shredded cheddar cheese until well blended and smooth.
Mix in the green onions, 2 tablespoons parsley, dill, garlic powder, Worcestershire sauce, pepper, and salt until all ingredients are evenly distributed.
Cover the bowl with plastic wrap and refrigerate for at least 2 hours or until the mixture is firm enough to handle easily.
While the cheese mixture chills, combine the chopped pecans and 2 tablespoons parsley on a large plate or shallow dish.
Remove the cheese mixture from the refrigerator and use your hands to shape it into a ball on a clean surface.
Roll the cheese ball in the pecan-parsley mixture, pressing gently to ensure the coating sticks all over.
Wrap the finished cheese ball in plastic wrap and refrigerate for at least 1 more hour before serving.
When ready to serve, place on a festive platter surrounded by your favorite crackers, sliced baguette, and fresh vegetables.