Yin-Yang Promise

The Yin-Yang Promise is a sacred tradition practiced by the people of Ninjago. Their signification together is resembled a medallion: Yin meaning the female, and Yang meaning the male. The event happens twice a year, on the second Sunday, one in late March and one in early September.
== Notes ==
* No one knows if there is a ceremony of the first, but in Operation Anacondrai (ruined) and The End?, there is sure to be a ceremony in the second. Nya pinned the Yin side on her Season 10 suit.
* The medallion shows Yin and Yang. Yin means female, associated with darkness. Yang means male, associated with light. Jay pinned the Yang side on his Season 10 suit.
== Gallery of Yin-Yang ==
Yang.png|Yang, the active male principle of the universe, characterized as male and creative and associated with heaven, heat, and light.
Yin.png|Yin, the passive female principle of the universe, characterized as female and sustaining and associated with earth, dark, and cold.