write half date then select date from date picker which display in DateTimeOffset instead of Date format

I am using SSRS 2008 R2. I have problem in Date Parameter whose type is Date/Time and it is like date picker.

When we write half date and go to select date from date picker then date is displayed in DateTimeOffset type which stops execution of my report.

->error: Conversion from type 'DateTimeOffset' to type 'String or Date' is not valid.

Steps to get issue (Date is displayed in DateTimeOffset instead of DateTime(Normal)) :
1) Create Date parameter with Date/Time type.

2) Run report so Date Parameter display as Date Picker control.

3) Write half date in Date parameter like 1/1.

4) Now without moving elsewhere select Date picker symbol and select any date.

5) It will display date in type of DateTimeOffset(1/1/2012 12:00:00 AM +05:30) instead of Date(1/1/2012).

If Anyone have found this issue and got solution then Please send me solution.
If need more detail let me know.

Thanks in Advance.

Vir14