Hi! I’m Alice Johnson, here to help you out with the Evite app issue you’re experiencing. You mentioned the Edit Date/Time window freezes on your Mac running OS X 10.15.7. Just to make sure I fully understand: Is this happening only when you try to edit the date and time on a specific invitation, or does it freeze whenever you open that window for any invitation? Also, are you using Evite on a web browser or the Evite app on your Mac?

Meanwhile, here are some initial steps that often help with freezing issues in such scenarios:

1. Clear Cache and Cookies in Safari (since you’re on a Mac, Safari is likely your browser):
- Open Safari.
- Click Safari > Preferences > Privacy.
- Click “Manage Website Data,” then “Remove All” to clear cache and cookies.
- Restart Safari and try editing the date/time again.

2. Check for Browser Updates:
- Go to the Apple menu > App Store > Updates and ensure Safari is up to date.

3. Disable Browser Extensions Temporarily:
- Sometimes extensions can interfere with scripts that Evite uses.
- Go to Safari > Preferences > Extensions and uncheck all to disable them temporarily.
- Reload Evite and see if the Edit Date/Time window still freezes.

4. Try Another Browser:
- If possible, test the same edit operation on browsers like Chrome or Firefox installed on your Mac. This helps isolate if it’s a Safari-specific issue.

If you've already tried some of these, please let me know which ones so I can suggest more advanced troubleshooting steps, like checking for account issues or resetting browser settings related to scripts that might affect Evite.

Are you comfortable trying these? Let me know, and we’ll get this fixed for you!