Use the following format:
Event Name (Date)
Where: Place, City, Country (you can also add a [map link])
When: Time and Date (your local time, feel free to use your country date/time convention)
Who: Event Owner/s (use the [[User:username|Name Surname]], this will help people get in contact with you)
Abstract: Here goes a brief description of the event, like what will be offered (liveUSB station, CDs) and/or more details on the event (e.g. speeches, demos, activities, food).