Single post prev/next pagination based on Event Date

Greetings,
I’ve been working on this for a couple hours and can’t figure out how to get the previous/next navigation on the single post page to work off of the event start date instead of the post date. Is this possible? If so, can you give me the code or instruct me on how to do it?

Thanks much,
Kim

https://wordpress.org/plugins/sugar-calendar-lite/