International Surfing Day is celebrated on June 21, 2017. The day, held annually on or near the date of the summer solstice - usually June 21 or 20 June on leap years - is an unofficial, environmentally conscious sports-centered holiday that celebrates the sport of surfing and the surfing lifestyle and the sustainability of ocean resources.
Contests and prizes are also part of the celebration with surfing related industries donating prizes such as surfboards and wetsuits. Another purpose of the celebration is to promote the popularity of surfing and to attract new participants.
International Surfing Day was established in 2004 by Surfing Magazine and The Surfrider Foundation. International Surfing Day closely follows the spirit and intent of the World Surf Day established by the Usenet newsgroup alt.surfing in 1993. International Surfing Day is a worldwide celebration of the sport of surfing.
International Surf Day events have been held on all populated continents including South America where it is celebrated in Argentina, Brazil, and Peru. Also in the Southern Hemisphere the holiday is observed in the Oceanian nations of Australia and New Zealand. The day is also widely observed in the American state of Hawaii, also in Oceania. (With material from: Wikipedia)