When you have the feature Hold & Release, the publications will be made available to the readers at a specific time. It is possible to change the release time for a specific edition by changing the time in the Hub: Publication Overview -> Edit Publication
Note: This can also be done in the old back-end, provided you have a user: Catalogue -> Edit -> Change Automatic Release Target. However, only customers with special setup have access to admin.e-pages.dk, so this will only apply to few users:
This has to be done after the edition has been processed and before the scheduled release time.
You can also release the publication immediately by clicking "Release".