Every year IMO (International Maritime Organization) celebrates World Maritime Day.
"The exact date is left to individual Governments but is usually celebrated during the last week in September. The day is used to focus attention on the importance of shipping safety, maritime security and the marine environment and to emphasize a particular aspect of IMO's work.
World Maritime Day 2014: “IMO conventions: effective implementation”
World Maritime Day 2014 will be celebrated on the last Thursday of September.
The 2014 World Maritime Day Parallel Event will be held in Morocco."