How to Use Instagram Story On This Day Feature
Instagram Story has a On This Day Feature that allows you to see your previous post on this day and repost it.
Facebook has had a similar option inside settings/memory that allows you to see and share what you posted on this day and now you can use a similar option inside Instagram Story.
The option is inside of the create mode in Instagram story.
Keep in mind, this only works if you have something on this day that you posted on a previous year.
If you click the dice on top, it will show you a different year's post.