Hi Juergen. I think what you're asking about is availability scheduling and conflict management. You want to predetermine what time slots are available, and/or which slots are unavailable, either by entering the actual dates and times, or by defining some sort of repeating weekly, monthly or yearly model. Then if someone tries to enter an event that would overlap with an unavailable time slot, you want to either prevent that from happening altogether, or somehow alert the user and flag the conflict. Is that what you had in mind? This isn't something that is built into the calendar, but we've done it in various forms as custom modifications for customers before. If you're interested, contact me at
[email protected] and we can discuss the details. -Jeff