SAP PI REST Polling issue

Hi All,

I am using the REST Polling adapter where my URL is

https://crust.impl.com/API/Employee?End_Date=2016-03-03-08:00&Start_Date=2016-01-01-08:00

Here my End Date is current date and Start Date is when my interface last ran, so I can use {IncrementalToken} for Start_Date which can be configured thru Incremental token of last run, how do I pass current date timestamp for End_Date ?

Thanks in advance

Ravijeet