You can either type in exactly what you want...
or you can use a macro that runs each time you print.
Option Explicit
Private Sub Workbook_BeforePrint(Cancel As Boolean)
With Worksheets("sheet1").PageSetup
.LeftFooter = Format(Date, "dd-mmm-yyyy")
End With
End Sub
This goes into the ThisWorkbook module.
If you're new to macros, you may want to read David McRitchie's intro at:
http://www.mvps.org/dmcritchie/excel/getstarted.htm