Zimbra Desktop 7.2.1 shows hyperlinnk for days to calendar. How to disable it?

Hi,

I have a problem with showing of mails in Zimbra Desktop 7.2.1 client. When user receive mail with words which mean days of week (e.g. mon, Tue, WED and etc) they are showing as hyperlinks to calendar records. See attachment. And in case when mail is written French where word "Mon" means English "I" they all are hyperlinks. And it show popup window if I move mouse cursor above the link.
QUESTION:
How can I disable such highlighting of days in Zimbra Desktop 7.2.1 client?