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The rift cannot be opened again until the next Yin-Yang Eclipse.”
“Which, according to my calculations, won't happen for 3,721 years.

The Yin-Yang Eclipse is a rare event that occurs rarely in Ninjago, approximately every 3,721 years, with only two or three recorded appearances.[1] The most recent eclipse occurred sometime after the Battle of Stiix, on the annual Day of the Departed. It allowed Yang to open the Rift of Return, which he planned on using to resurrect himself from his ghostly state, which was inflicted on him by his flawed use of the Yin Blade to achieve immortality. However, Cole intervened, destroying the Yin Blade which slowly closed the rift. Prior to its dissipation, Cole and Yang's students crossed through the rift, which, in turn, caused them to turn back into humans.

Despite occurring so rarely, the latest eclipse did serve a purpose, by helping Cole to become a human again and indirectly making Yang at peace.


Day of the Departed

Dr. Saunders of the Ninjago Museum of History chose the holiday and its coincidental eclipse on which to open the Hall of Villainy exhibit, which the ninja visited before departing to celebrate the holiday. Unfortunately, Master Yang chose to take advantage of the event and Cole's growing insecurity with his ghostly form to regain his old weapon, the Yin Blade, and unleash a group of defeated villains to take their vengeance on the ninja. Yang warned his pawns that their return from the Departed Realm would only last as long as the eclipse unless they dispatched a living victim with their Departed Blades; they thus set out to attack the ninja and their allies. Meanwhile, Yang took advantage of the eclipse's power and his regained blade to open the Rift of Return in hopes of regaining his own humanity.

Yang's pawns—with the exception of a repentant Morro—were defeated and sent back to the Departed Realm, while Morro warned the ninja of what was taking place. Fortunately, though they were unable to help directly, their arrival gave Cole the strength to fight and defeat Yang and free his students, who passed through the rift and regained their own humanity. Cole then attempted to take Yang through the rift with him in order to restore them both, as over three thousand years would pass before the next Yin-Yang Eclipse happened. However, bound to the Temple of Airjitzu by a curse, Yang chose to allow Cole to return while he remained "master of the house" and restored the temple to its former beautiful condition.


Ninjago: Masters of Spinjitzu

Day of the Departed


  • The timing of the eclipse is a reference to Star Wars, where C-3PO states that the odds of successfully navigating an asteroid field are approximately 3,720 to 1.


Promotional media

In Day of the Departed



Main events

War of the Oni and the Dragons · Battle of Nine Days · Stone Wars · Reign of Aspheera · The Devourer's bite · Long Winter · Serpentine War · Battle for All of Time · Battle between brothers · Search for the Golden Weapons · Attack of the Great Devourer · The Final Battle · Nindroid crisis · Second Serpentine War · Battle of Stiix · Fall of Ninjago · Rise of Ninjago · Oni's invasion · Siege at the Monastery · Lloyd's Journey · Liberation of the Never-Realm · Attack by Unagami · Battle for Shintaro Mountain · Conflict on the Island of the Keepers · Kalmaar's assault on Ninjago City


Ninjaball Run · Ninjago Talent · Tournament of Elements (Thunderblade) · Street Race of Snake Jaguar · Puppy-petting competition · Terra Technica Dance-Off · Speedway Five-Billion · Slug race


Slither Pit · New Year Festival · Day of the Departed · Dragon Day · Yin-Yang promise · Turnip Festival · The Choosing


Trial-By-Mino · Trial By Sphinx


Alternate timeline · Yin-Yang Eclipse