Hello there, Lil_Caboose!
Thanks for reaching out to the Apple Support Communities! It sounds like you're needing to view entries from over a year ago in the Calendar app.
To get started, if you use the following resource and search for an event are you able to locate one: Search for events in Calendar on iPhone. This will alllow you to search for keywords from the event title.
For iCloud Calendars you may be able to view these previous events when you log in at the iCloud website.
Let's also ensure that your past events are not hidden as well. To do this, sign into your iCloud account at the link above and click on the Calendar icon. Next click the gear icon in the bottom-left corner. From here choose Preferences, and in the Advanced pane, make sure that the check box next to "Old Events" has been deselected.
Let us know the results and take care!