The June 2013 backlog reduction drive has been under way since the beginning of the month and has attracted a good many editors. It runs until 23:59 UTC on 30 June, so don't delay assessing and/or improving those articles!
Wikipedia editors prepare to go over the top on 29 June 2013
A series of World War I-themed edit-a-thons will be held on 29 June 2013. The goal of this project is to increase the quality of existing articles and to expand the coverage of the conflict on the different language versions of Wikipedia. The organisers of the event hope that this work will form a significant step in preparing Wikipedia to cope with the expected spike of interest in World War I as its centenary approaches.
As of 22 June, events are planned in Australia, Belgium, Germany, Greece, the Netherlands, Serbia, Sweden and the United Kingdom. While most of these events will be focused on in-person attendance at a central venue, the Australian edit-a-thon will be conducted online. The editor who makes the largest individual contribution will receive a prize as a reward for their efforts.
Further information on this event, including links to the country pages where interested editors can sign up, is available on Meta-Wiki here.