hi phani thota,
if you want to create the data on your report, please see the attachment. extract the contents and change the .txt file extension to .rpt.
this method is a bit of work but there are instructions on how to do this on the report design mode and in the individual formulas as well.
it is always advised though, if you can, to use a date lookup table as mentioned earlier by Dell & Abhilash.
-jamie