Hi Abhilash,
I tried this from this thread
http://scn.sap.com/thread/1088581
but still I am not getting.Can you please suggest
To set the default date for a date parameter please follow the below steps.
1) Set the default value in the date or datetime parameters to a date that will never appear in the data (for example, 1900-01-01).
2) Enter in the Record Selection Formula field a formula similar to the following:
DateVar DateParamValue;
If {?DateParam} = Date(1900,1,1) Then
DateParamValue := CurrentDate
Else
DateParamValue := {?DateParam};
{Table.DateField} = DateParamValue;
The date parameters will now default to the current date.