A Chinatown tradition that hits the half-century mark this year, the August Moon Festival brings a grand celebration of Chinese culture to the streets of Boston August 11 from 10 a.m.–5 p.m. Taking place on Harrison Avenue and Beach, Tyler, Hudson and Oxford streets, with a performance stage near the corner of Harrison Avenue and Essex Street, this showcase of Chinese food, arts and crafts, dance, martial arts and music has origins that go back more than two millennia, and is historically meant to give thanks for the full moon harvest in its home country. Although not celebrated under the light of the moon, visitors can nevertheless savor a sweet mooncake and more while taking in the best the neighborhood has to offer.