Date format in Request URL

Hello Experts,

Can anyone let me know passing Date as Input Parameter in Odata Request URL. I tried with different formats . I am getting repsonse as "Invalid parametertype used at function 'eq' " . In structure declaration Date field Edm.Core Type is Edm.DateTime and for Abap type tried with both Data Element and InternalType . In Back-end, RFC with Input Date is having Date with type ERDAT. 

Appreciate your help.

Thanks.