You can modify an iteration's start and end dates in the project area
editor. Select an iteration in the Iterations section of the Overview
tab and click the Edit button. From there, you will see the option to
adjust the start and end dates.

FYI, the templates let you configure *relative* start and end dates. For
example, you can create a few iterations and say that each one will last
for one month. Then when you create a project area using that template,
the project area will be created with iterations that last for one
month, starting from the current date.

A process template gives a project area its initial state when it is
created and then there is no further connection between the two.
Changing a template won't affect any existing project areas.

Jared Burns
Jazz Process Team


starz wrote:

I am able to create iterations plans for releases and iterations. My
understanding is that, e.g. for a Scrum project, such an iteration
plan is the product backlog or sprint backlog. But all these plans
get a predefined start and end date that I am not able to modify.
When I edit the dates in the corresponding source of the process
template, it does not affect an existing project (btw, that is what
I would have expected; however, why do you define dates in the
template at all?). How do I modify the start and end date for an
existing plan? Or how do I set it when creating the plan?
Thanks a lot!