Schedule an event by clicking on its time slot in the calendar (drag your mouse to alter the length of the event).

After entering the event title, you can click Create Event if you're all done, or edit event details if you want to add more information.
Use the event details page to customize your event. You can add guests, reserve meeting rooms, and set reminders for the event.

When you receive an invitation to an event, Google gives you multiple ways to respond Yes - Maybe - No. They all work.
To invite all department members to an event, you can't just invite the department name (it won't work right). You must invite each person separately- fortunately we came up with an easy way to do this.
You may see some of your colleague's names on the left side of your calendar in a section titled My Calendars or Other Calendars. These people have shared their calendar with you. To view their schedule, simply click on their name.

Do you manage a calendar other than your own?
You have a couple more calendar basics...