"China, Japan and South Korea? Japan, China and South Korea? South Korea, China and Japan?"

Written by Icelandic composer Jón Leifs in 1964, the piece called Hekla, Op 52, requires four sets of rocks hit with hammers, steel plates, anvils, sirens, cannons and metal chains to play.

Finland celebrates "National Sleepy Head Day," where the last person in the house to wake up is thrown into water by the early risers.