An event series is a group of events that are identical, except for the the date & time.

Prekindle will automatically group events together that have the same title. This makes it easy for customers to find alternate dates & times no matter which page they end up on.

You also want to make sure your Prekindle calendar page is toggled to Event Series as well.

Example:

Instructions:
Go to your Account Preferences > Branding > Your Prekindle Site