I've added a page for World Tarot Day under the "Events" tab: http://www.tarotguild.com/page/world-tarot-day
World Tarot Day was created in 2003 by CTGM Den Elders. It is supported by many major Tarot organizations, individuals, and websites across the globe.
The stated purpose is:
"To promote the use of the Tarot tool across all human made borders, be they political boundaries, misunderstandings of the mind, or ignorance of the tool itself, for the benefit and growth of the Spiritual Self."
For more information, visit the official site here: http://worldtarotday.org