Google Search has a feature named "instances" that shows you when an event happened each year in history. So if you run an event annually, Google may show the instances of those events over time in Google Search.
Khushal Bherwani first spotted this and posted an example on Twitter who showed this for a query on [international kite festival] - I can replicate it but here is the result:
Clicking on each result will bring you to a revised and refined query with the date and name of the event.
Google can also show this in a more knowledge panel-formed interface.
Here are more examples:
@b4k_khushal & @rustybrick I have noticed Instances" carousel for the first time on mobile SERP. pic.twitter.com/C1upqfNMQl
— Anuj thaker (@Anuj_Thaker03) January 8, 2023
I do wonder if this would work for conferences, like SMX Advanced, that repeat annually?
Forum discussion at Twitter.
Update: Another example:
Very cool, I'm seeing this for some events, like conferences (see screenshot below) -> Google Search Instances, For Recurring Events & Festivals
— Glenn Gabe (@glenngabe) January 10, 2023
Nice catch by @b4k_khushal https://t.co/ra0ZzZXy96 via @rustybrick pic.twitter.com/HqQFaJLaR0