I don't think this is the right information because it is still 9 days before the event starts and bigpoint often changes things in the last days before the event because of the bugs they find on the beta server.
Seafight birthday event info 03/01/2013 - Seafight - 21 Replies we will have new design : http://newsletter-images.a.bpcdn.net/13022013/seaf ight_ah_Birthday_Event_Ship_Final_s.jpg
and new pet http://newsletter-images.a.bpcdn.net/13022013/seaf ight_ah_Birthday_Event_Pet_final_s.jpg
the event will be between 18-28 march 2013.