Event creation happens in two areas of your TeamPage. The first “Add” link can be in the header of your schedule on the TeamPage. The other links are located in the team calendar section. Here you can either click the “Add a Team Event” link, or click on one of the dates on the calendar.
Once on the New Event page, fill in the appropriate information (event type, time, location etc.) and click “Create”. To later edit this event, go to the Event Overview by clicking on the event in the Schedule and selecting “More Information”. Once you’re on the Event Overview, click the “Edit” link, located in the top right corner of the section.
Do you have an event that occurs daily/weekly/monthly etc.? see recurring events: How do I create recurring events?