I don't understand which platform you are using. It's either Jira Cloud or Jira Server.
If you're using Jira Cloud, this can't be done. I mean you could try to reopen the sprint just to close it again, but this would close it with the current date/time and not a specific date/time.
If you're using Jira Server, then you could modify the database directly to change this. There is a KB on this in How to edit the Dates Associated with a closed Sprint. However this change requires you to directly modify the SQL database Jira is using, an action that is not officially supported. It probably won't cause any problems to do this, but I would still recommend that you create a fresh backup of your database before you try to make this change. I would also recommend that you stop Jira before changing this SQL entry. This way once the SQL change is done, you can simply start Jira and that way all the internal caches about this should be cleared by the restart.
When to use CSV importer When managing your processes in Jira, there are many occasions where you need to create a lot of tasks. Creating them one by one will cost you a lot of time and effort and i...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events