Click on the map. Search for a road name or venue, select an item form the popup and then press the button "geocode this location". Drag the location marker if necessary.
"News" items include a date, featured image and gallery. Adding date automatically adds the event to the Calendar. Clicking "Front page" adds the item to the home page, in date order (delete the publishing date - not the event date - to reset it to today. "Sticky" puts the item at the top no matter what it's date.
Please note that the category "News" includes both upcoming events and reportbacks.