One of the great benefits of UA Google Apps is access to Google Calendar. Your time is valuable and keeping a calendar is probably one of the ways you stay on top of the things you need to get done. A calendar reminds you of important meetings you might need to attend and events that require your action. A calendar is also useful for time-related activities that involve multiple people like scheduling department or organizational meetings.
One additional advantage of using UA Google Calendar is that you can share your calendar with others or embed it in Blackboard, Google Sites, a blog or your website.