Is Walmart Open or Closed on Memorial Day? Here’s What to Know Walmart stores are open their usual 6 a.m. to 11 p.m. hours on Memorial Day 2026, while Costco is one of the few national chains staying dark. Original Source: https://www.moneytalksnews.com/is-walmart-open-or-closed-on-memorial-day-heres-what-to-know/