When: date and time
Where: good place to party in some city (map)
What: description of the planned event
Provided: anything provided by the organisers like cake, balloons, food, drink, silly hats
Bring: anything people should bring, like food, drink, costumes, OpenPGP fingerprints, etc
More info: link to the page where people can get more information and/or discuss event
Promotion: links to mails, blog posts, tweets or other promotion done for the event.
Reports: links to reports, blog posts, photos etc about the event.