If you created an event and you want to edit it's dates or times, go to the event's dashboard and select "Edit".
Single Day: To edit a single day event's date and time, use the edit screen to change the dates and times to your preference.
Shifts: Once shifts are added you will see the following section "Shifts" available for you to import or add shifts individually (since the below example is for a single day event, the shifts each alone can be for different days, Note: when an event is recurring (ongoing) or is more than just a single day, a shift created for a recurrence will be limited to only the start and end time within the day of the recurrences:
Recurrence (ongoing): Once you decide to create an event with recurrences, when editing the event, you will see a section for dates. All the dates in the recurrence can be specifically updated or you can collectively update all of them or individually select a specific row/date to edit the "registrants", the number of spots or to delete them. Note: If you created a recurring event with shifts, "dates" is the area that defines the days in which people can register to, and "shifts" defines the times available.
Note: Once you add shifts, the shifts will need to be created in a separate section after clicking Save and Continue, also take into consideration that you can have an event where people are registered to a single day event and if you decide to add shifts later you would need to move them into the specific shifts created otherwise they are orphaned