Windows Live Calendar officially updated on the public server and is out from dogfood server. The update comes with Groups Calendar feature support and four new themes – Carbon, Graffiti, Wildflowers, and Moonlight. If you’ve created Groups in Messenger, now when you login to your calendar, you might have a few extra calendars on your list – correspond to each of the Groups you are part of. Events you add to the Group Calendar will show up on all other members of the Group.
You can also access the new Group Calendar from within Messenger. When you do, you’ll be taken not to your own personal Calendar site, but the actual Group’s Calendar.
You’ll notice few difference: First, there’s no option to “Share” the Group Calendar, it’s automatically shared with your Group — it means you can’t share the Group Calendar with public or any other persons, unless you add them into your Group. There is also a limitation of only one calendar per Group, so you cannot create multiple calendars for the same Group. Also notice that you cannot directly create “social events” or Windows Live Events from, it is because for every Event there’s a Group associated with it – so essentially there’s a separate Group Calendar for that.