Are you looking to add your Premium Event to your calendar?
You will need to select "View" next to the invitation you'd like to add. Scroll down to view the event details and you will see the "Add to Calendar" option.
Once you click on Add To Calendar, you will be able to choose from the following which calendar you would like to use.
Please note, as the host, if you do not include an end time on your event, it will give your guests the same end time as your start time on the calendar. On the calendar, an end time is requested and we cannot change that since it is a 3rd party tool. You may always manually edit the end time on your calendar to reflect the event time on the card.