Dark Matter Day
Celebrated on 31 OctoberPhysicists claim that the Universe is 85% (according to another version - 95%) composed of dark matter - a substance that can only be seen when observing the phenomenon of gravity.
The holiday established in 2017, which is celebrated every year on October 31, is intended to draw attention to the importance of studying one of the mysteries of the Universe.
Other holidays on 31 October
- Halloween - All Hallows' Eve
- World Savings Day
- World Cities Day
- International Black Sea Day
- Sign Language Interpreter Day in Russia
- Day of workers of pre-trial detention centers and prisons in Russia
- Books for Treats Day
- Folk calendar - Lukov day
- Pumpkin rescue
- International Hockey Goalie Day
- Day of red rowan and flying tits
- Day of Seven Billion
- Celebration of the end of the harvest in Ireland (Samhain)
- Lutheran Reformation Day
- Memorial Day of the Holy Apostle and Evangelist Luke
- Memorial Day of St. Julian the Persian