The "degenerate" Latter Day of the Law. A time period supposed to begin 2,000 years after Sakyamuni Buddha's passing and last for "10,000 years"; follows the two 1,000-year periods of Former Day of the Law and of Middle Day of the Law. During this degenerate age, chaos will prevail and the people will be unable to attain enlightenment through the word of Sakyamuni Buddha.
The Three Ages of Buddhism, also known as the Three Ages of the Dharma, are three divisions of time following Buddha's passing. The Latter Day of the Law is the third and last of the Three Ages of Buddhism. Mappō or Mofa, which is also translated as the Age of Dharma Decline, is the "degenerate" Third Age of Buddhism.