How to update native calendar events programatically?

Through a friend's yahoo mail account, I went to the group calendar that I moderate. He isn't able to edit or update the calendar and I want all members to be able to do so. My Management page says they can. I wonder why the "edit/delete..."...

This occurs when I try to modify the calendar.

About a week ago, after I added an event to my calendar, I clicked Update on the calendar module on the My Yahoo main page, and now it won't show events any more. Under Today, it says to "Sign up for Yahoo! Calendar and be reminded of today's and...

I realize companies feel they have to "update" everything, but you changed what was great about the old calendar: its simplicity! It was easy to see, easy to read at a glance, fast and easy to navigate through. The new calendar is like reading...

What are good (ideally free) web based tools for building a Calendar and also an Announcements/Events Board? And can these tools produce content that I can embed in a web page? Ideally I'm looking for two features, so it doesn't have to be the same product...

I've come to the monthtly update of our event calendar and I keep getting the following error when I try and add an event: The calendar operation performed on Monday October 8, 2007 was unsuccessful. I have managed to add a couple of events but now can...