I just figured out how to do this for JIRA v6.4.7 1) From left hand nav panel, select "backlog" 2) Find name of active sprint. 3) Ensure sprint info is maximized with V icon rather than > icon. 4) Hover on end of sprint date. 5) Observe that display turns into edit field. But yes, not that obvious.
I'm not quite sure, if it is what you are looking for, but if you go to agile you can change the sprint on the work tab by clicking on the little triangle next to the sprints name. If you click on the second date on the opened window, you should be able to change to end date of the sprint.
The same thing also works for the plan tab, just click on the second date, and you can adjust it.
Note: To be able to change the dates of a sprint you need to meet the required permissions. Personaly, i'm not sure which they are, but I would guess project administrator role should be enough.
Learn how to use two new reports for next-gen projects in Jira Cloud: Cumulative flow diagram and Sprint burndown chart. Ivan Teong, Product Manager, Jira Software, demos the Cumulative ...
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