changing color of Calendar font

I do have a little issue.
When i add a appointment into my 8220 cal the font is black on the white background.
As soon as i change the appointment to a ALL DAY EVENT the font turns yellow, regardless which background.
Not really easy to see.
Is there any suggestions how to change the font color......
The background doesn't help to change i have tried all colors

Please help.

I have the same issue with that annoying yellow font on all day events on the 8220. If you were able to solve it, I would greatly appreciate it if you could share your knowledge becaause I�ve looked alll over the web to no avail. Thanks.