Thanks for visiting the Apple Support Communities, rwfisheriv,
Based on what you've described, we have a few troubleshooting steps we'd like to offer that will help us further isolate the issue. To get started, please follow each of the below steps one at a time, testing between each to see if the issue is resolved:
- Close all open apps: Close an app on your iPhone or iPod touch - Apple Support
- Restart your iPhone: Restart your iPhone - Apple Support
- If you sync your calendar with a service (like iCloud, or your email provider), try searching while connected to a different network.
If you're still not able to search in Spotlight, or the Calendar app directly, don't hesitate to respond back.
Cheers.