How to get yesterdays date by default using @prompt function in universe.?

Hi Expertise,

Can anyone help me in getting the yesterdays date by default after report gets opened.

for example if the report is opened on 23-june-2015 then the report must show the values of 22-june-2015.

later if the user refreshes the report, he should get the option for selecting the date. ie OPTIONAL PROMPT

The syntax I had tried is EL_EmployeeLoginTime.InTimeDate=@Prompt('Enter value(s) for Intime Date','D','My Logins\Intime Date',Mono,Free,Persistent,{'2015-09-15'},User:0,optional)

Please improve the above example to get the yesterdays date by default in the report.

I am using SAP BO 4.0 SP3

Thanks & Regards,

Santhosh.