Yes they will be open
Walmart in the Poinciana, Kissimmee area would be open.
From a quick Google Search: On Sunday, Dec. 31, stores open at 11 a.m. and the open at 10 a.m. on Monday, Jan. 1. The department stores notes that closing hours vary by state so it helps to check online or call ahead. Macy's: Locations will be open for New Year's Eve and New Year's Day. Meijer's: Pharmacies will close at 7 p.m.
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