 They primarily assist with package delivery on weekends & holidays, but can also be used to perform standard route duties on Saturdays.Much support for the introduction of a nationwide rural mail delivery service came from The National Grange of the Order of Patrons of Husbandry, the nation's oldest agricultural organization.Formerly, residents of rural areas had to either travel to a distant Post office to pick up their mail, or else pay for delivery by a private carrier.