is the united states post office open today
To see the United States Postal Service website lists the 2012 holiday schedule which lets you know what days the post office will be closed. See this schedule at http://about.usps.com/news/events-calendar/2012-federal-holidays.htm.
Most United States Post Office locations are open Monday through Friday. Each office may have different operating hours. To find operating hours for a specific location, visit http://www.usps.com/.