All post offices in the greater Boston district, including Allston, Brookline Village, East Cambridge, Harvard Square, Needham, Newton Center, Newtonville, North Waltham, Porter Square, Somerville, Watertown and West Newton, will be open on Saturday, July 3, but many will shorten retail lobby hours and close at noon. Regular mail delivery and collection times for July 3 will be unaffected by …
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