How to validate time component with currTime

In my application i need and time component widget, In entity i have defined column as "StartTime" and data type is "Time".
In screen it shows calendar which is bit messy (attached screen shot-- time).
I want to validate the time should not be less than current time, but the CurrTime() function is giving me GMT time and my Loacal in GMT + 4 hours, so the validation is not triggering.

Is there any better way to do it.