You have created an event, but now you want to move it to another day. To arrange this easily, go to the Main tab of the event. Here you click on the 'Actions' button at the top right and choose your Move event.
Now select the new date.
If you want to move the event a few hours, either forward or back, you can do this using Move times, which adjusts the old times.
All dates and times, from production start to scan times, will be included by default. You can choose whether you also want to start the ticket sale, publish date and personnel shifts. These are selected by default.
Then press Move at the bottom, and you're done!