Hi there! I understand you’re having trouble with the Flightview web app calendar showing a black screen where the dates should be, right? Let’s get that sorted out.

To start, could you tell me if this happens all the time or just when you open the calendar? Also, have you tried refreshing the page or clearing your browser cache? Sometimes cached data can cause display issues.

In the meantime, here’s a step-by-step approach we can try:

1. Refresh the Page: Simply reload the Flightview web app calendar page in your WebKit browser.

2. Clear Browser Cache:
- Open your browser settings.
- Find the option for clearing browsing data or cache.
- Clear cached images and files (no need to clear cookies unless you want to).
- Restart the browser and open the calendar again.

3. Check Browser Extensions: Some browser extensions (like dark mode or ad blockers) can interfere with display elements. Try disabling extensions temporarily to see if that helps.

4. Try a Private/Incognito Window: This helps to rule out cached data or extensions causing the problem.

5. Check WebKit Browser Updates: Ensure your browser is up to date, as updates often fix rendering bugs.

Since your OS is Windows 10 and you’re using WebKit, the above steps cover common causes that could lead to a black calendar screen.

If after these steps the calendar still appears black, it could be a rendering issue in the web app itself, possibly needing a software update or a fix on Flightview's side.

Let me know how these steps go or if you have tried any of them already. If needed, I can help escalate or provide additional troubleshooting.

Are you satisfied with this initial guidance so far?