I have a customer who uses Zimbra. They are having this issue where the date in the calendar will not change on its own.
So if they leave Zimbra desktop on over night, it won't switch to the next day.
The issue is, that if they don't switch to the next day themselves, they won't get reminders for that day.
I'm sure I can fix this with a forced restart of Zimbra in the middle of the night, I just wanted to check if their was a better solution.