Hi, Annie. Sorry you’re experiencing this.
I’m unfamiliar with this issue; maybe a screenshot or video screen capture might help better explain what you’re experiencing.
One thing I can guess at, though, is if you change the WordPress General Settings and/or The Events Calendar’s Settings to use a different date format (such as YYYY-MM-DD), it might resolve this issue.
If there is an issue with the chosen date format(s) causing things to not work properly, please let me know (and provide steps to replicate) so I can try to reproduce the issue and file a bug report.
Looking forward to hearing back from you. Thanks!