If you’re hoping to stop at Costco on MLK Day 2025, which falls on Monday, Jan. 20, here’s everything you need to know. Costco members are in luck on MLK Day this year. The warehouse will be open during its regular business hours on Monday from 10 a.m. to 8:30 p.m., similar to last year.

While most government functions will not be operating on Monday, most grocery stores, big box stores and restaurants will remain open. Major chain stores such as Target, Costco, Walmart, The Home Depot, Jewel-Osco and Mariano's will remain open on the holiday.

The holiday falls on the third Monday of January. A bill to make Martin Luther King Jr. Day a federal holiday was introduced on April 8, 1968 — four days after King was assassinated, according to the National Museum of African American History and Culture.