show with app
function(input, output) {

  # You can access the value of the widget with input$date, e.g.
  output$value <- renderPrint({ input$date })

}
fluidPage(
    
  # Copy the line below to make a date selector 
  dateInput("date", label = h3("Date input"), value = "2014-01-01"),
  
  hr(),
  fluidRow(column(3, verbatimTextOutput("value")))
  
)