Extended downtime on June 3, 2014: Publication of Kronos
The Kronos release for EVE Online will be published on June 3, 2014, during an extended downtime from 11:00 to 14:00 UTC.
Kronos introduces new ships, new items, rebalanced ships, improved game mechanics, graphical updates, additional audio customization, game play fixes and much more. A high level overview can be found here.
For the full details please consult the patch note page.
Further details are available in various dev blogs.
Check also the Kronos release feature page.