Original sentence: Moonfest is held each year on the 500 Block of Clematis Street shortly before Halloween, and a seasonal downtown Green Market is held each winter on Saturdays on Second Street and Narcissus Avenue.Moonfest, an annual festivalis held the Saturday before Halloween
Edited sentence: Moonfest is held each year on the 500 Block of Clematis Street on the Saturday before Halloween, and a seasonal downtown Green Market is held each winter on Saturdays on Second Street and Narcissus Avenue