Is the post office open on Juneteenth - mobilsocial.com No Mail Delivery: Post Offices Closed on Juneteenth Is the post office open on Juneteenth?. Since Juneteenth is a federal holiday in the United States, the U.S. Postal Service (USPS) will be closed on Wednesday, June 19th, 2024. This means there https://www.mobilsocial.com/is-the-post-office-open-on-juneteenth/