Stamp Out Hunger, the annual drive that allows Postal Service employees to collect food donations for their communities, will be held Saturday, May 11.

The National Association of Letter Carriers leads the one-day event, with help from USPS and other organizations. Since its launch in 1993, Stamp Out Hunger has grown into the nation’s largest one-day food drive.

To participate, customers are asked to fill a bag with healthful, nonperishable food items and place it by their mailbox for mail carriers to pick up. During the drive, postal employees collect the food and donate it to local food banks and pantries.