"Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds," an inscription on the James Farley Post Office in New York City says.
However, Fox News reported Wednesday that the Postal Service plans to stop letter delivery on Saturdays.
Under the proposal, the Postal Service will continue to deliver packages six days a week.
The plan, which is aimed at saving about $2 billion, would start to take effect in August. Under the new plan, mail would still be delivered to post office boxes on Saturdays. Post offices now open on Saturdays would remain open on Saturdays.