Symptoms
When a user selects a time with the calendar control, it is stored in Zulu time as opposed to local time.
Diagnoses
This is the default behavior of the calendar control. The community post below outlines the fix
http://community.k2.com/t5/K2-blackpearl/Smartform-WeekNo-Display/m-p/68336_M19540
Resolution
Creating an expression to properly add/subtract the needed number of hours to convert time to local time resolved the issue.