Is that plug to remind you to take along the proper current converter when traveling around the world?
No (although that's good advice), the reason there's a plug in the logo has to do with the official theme of this year's observance:
This year’s theme aims to highlight tourism’s role in a brighter energy future; a future in which the world’s entire population has access to modern, efficient and affordable energy services.Yeah, it sounds like kind of a stretch to us, too.
Tourism today is at the forefront of some of the world’s most ambitious and innovative clean energy solutions: the aviation industry is implementing cutting-edge technologies to make aircraft lighter than ever before; commercial flights are beginning to use biofuels in their fuel mix; key card systems and energy saving light bulbs are increasingly being implemented in hotel rooms worldwide; and tour operators are asking for energy efficiency throughout their supply chains.
Today is also Ancestor Appreciation Day. Halloween is next month, so presumably, if you fail to give your ancestors their props today, you probably won't have to worry... much... about them haunting you tonight.
But do you really want to take the chance?