Except for its highest-priority service, UPS does not deliver packages on Sundays. Various shipping options are available through UPS, including Saturday delivery for an additional fee, but neither residential nor commercial delivery normally occurs on Sundays.
UPS delivers Worldwide Express, Next Day Air, Early A.M., Next Day Air and 2nd Day Air packages every day of the week except Sunday. The only exception to the company's normal shipping schedule involves UPS Express Critical packages, which are intended for extremely time-sensitive packages and situations. Express Critical packages are delivered 365 days per year, seven days per week, to all 50 states as well as Puerto Rico.