What's open and closed in Minnesota on MLK Day 2021? Local government offices will generally be closed on Monday. Author: Martin Luther King Jr. Day falls on the third Monday in January, and is held in honor of the civil rights leader's Jan. 15 birthday. This year it falls on Jan. 18. It's also a federal holiday, so there will be some services closed as a result. Here's a look at what's open and closed. Postal service The U.S. Postal Service will not be delivering mail, nor will post offices be open. (The only exception is for Priority Mail deliveries.) UPS and FedEx will operate as normal, though both UPS and FedEx say some deliveries might be slightly later because the USPS observes the holiday, so the services that use USPS may be delayed by a business day.