Walmart stores generally operate from 6am or 7am until 11pm on weekdays, but many locations are open 24 hours.
Additionally, some stores open an hour early exclusively for customers aged 60 and above. To avoid any inconvenience, it is advisable to confirm the operating hours with your nearest Walmart in advance. With over 5,000 stores across the US, you can easily find the closest one using the shop locator tool provided by Walmart. While Walmart remains open during most holidays, it is closed on Christmas. However, for the second consecutive year, stores will also be closed on Thanksgiving in November.
Reference source: https://www.the-sun.com/money/3053008/walmart-opening-hours-what-time-close/