Migrating journal to ojs, how to set publication date of old issues?

Im now in the process of migrating to ojs3 a previously existing journal, published monthly from 2006 to present.
For articles, you can manually set the publication date in the edit tab (btw, an example of the accepted date format near the form input, ie. YYYY-MM-DD, would be helpful).
But afther publishing, the issue itself appears as published today. I have been unable to locate any place to manualy set the publication date for the issue. Is it possible?
Thanks in advace for your help!

Solved by @juanito in Software Support. Thanks @juanito!