Halloween is known around the world and it's celebrated on October 31 in the USA, Canada, the United Kingdom and other countries. It has became commercialized by American pop culture, but rarely anybody remembers, that it has got pagan and Christian roots.
World Savings Day is observed in many countries around the world on October 31. This observance was introduced in 1924 to promote the importance of bank savings and restore people's confidence in banks.
The countries of the Black Sea annually celebrate International Black Sea Action Day on October 31. Creation of this observance is connected with approving the Black Sea Strategic Action Plan in 1996.