I have a current event set on the site, but the date needs to be changed. Is there a way to update the date, but keep the existing appointments?

Yes, you can move your entire schedule - including the existing appointments - to a new date without losing any data.

To shift your schedule to a different day, follow these steps:

In the Admin UI, open the event.
On the calendar located on the left-hand side, click the original date that currently contains your slots.
Click the Slots > Move Slots button.

A window will appear asking where you want to move the slots. Select the new date from the calendar picker.
Notifications: You will be given the option to automatically send an email notifying all participants that their appointment has been moved to the new date.

Moving the slots updates the calendar, but it does not automatically update the descriptive labels for your event.

Navigate to the Event>Preview page.
Manually update the Date field to reflect the new schedule. This ensures that the correct date appears on the landing page and in the parent-facing view.