Great Conjunction
From My Universe
The Great Conjunction of Saturn, Jupiter, and Mars (happens every 960 year) happened at 1pm on March 23rd 1345 - believed to cause black death.
The Great Conjunction is referred to as a Triple Conjunction. While it can be seen in the night sky as a bright object, scientifically has no effect on the Earth. However, it does affection one of the Five Elements, which affects magic. It affects Gravitational Magic or Attraction.