Editing sprint dates are only possible manipulating the information directly on the database.
However, this function is only possible on JIRA Server, since database customization is a restricted function in JIRA Cloud.
Hope these two links help to clarify this matter:
I'm John Allspaw, co-founder of Adaptive Capacity Labs, where we help teams use their incidents to learn and improve. We bring research-driven methods and approaches to drive effective inciden...
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