This is just a guess, but is the descrepency shown in Time Zone 2 (GMT-05:00) only appear on when the start or end date is a Friday or a Monday?
No, In all condition same problem is occuring like if Start Date and End Date is any of the Day of the Week .It is showing improper output.
Please suggest some way how to solve the Time Zone Issue.
This may be related to CS87028: Reports do not correctly handle fields of type Date in Integrity, or it may be something completely new. Could you post the computation you are using? Is this within the context of a report, a query, or something else?
For urgent issues, I would suggest opening a case: contact PTC Integrity Support for immediate assistance.
Additionally, are you working off a date field, or a date-time field?