My events in my calendar on iPhone XS keep disappearing, anyone knows why?

Hi  martinefromjacksonville,

Thanks for coming to Apple Support Communities for help today. As I am understanding, your calendar events are disappearing on your iPhone.

Are you using iCloud? Check out: Keep your Calendar up to date with iCloud.

Do you have other devices using iCloud calendar?

Have you checked iCloud.com from a computer's browser to see if your events are there? If you do see the events there, try toggling Calendar off and back on in Settings > [Your Name] > iCloud on your iPhone.

Let me know how that goes.

Have a great night!