Script assertion to check date time between min and max

KPP 

Why can't you get Min(CST&/ Current Time) and Max(PST(adding 2 hrs)) times in Epoch and compare your response time(as per my understand it's in Epoch).

If this scenarios works for you and I understood your requirement correctly, hope below code helps you.

Code::

import java.util.concurrent.TimeUnit

long epoch = System.currentTimeMillis() //Gives current time in Epoch in milliseconds
long epochin2hr = epoch + TimeUnit.MINUTES.toMillis(120) //Adds 120 mins to current time in milliseconds

long responsetime = 1234567890 //get this from your response as like above you did and convert to Millis

assert (responsetime <= epoch && responsetime < epochin2hr) // You can modify first condition(<=) depends on your requirement, like response time should be less than equal or greater than equal to current time.