Kalpa (time) in the context of "Aeon"

Buddhism is an ancient Indian religion, which arose in and around the ancient Kingdom of Magadha (now Bihar, India). It is based on the teachings of Gautama Buddha, who lived in the 6th or 5th century BCE and was deemed a "Buddha" or an "Awakened One". Buddhist records in the Theravada tradition list Gautama Buddha as the fourth Buddha of our kalpa, while the next buddha will be Maitreya Buddha. Buddhism spread outside of Northern India beginning in the Buddha's lifetime.

In the 3rd century BCE and during the reign of the Mauryan Emperor Ashoka, the Buddhist community split into two schools: the Mahāsāṃghika and the Sthaviravāda, each of which spread throughout India and grew into numerous sub-schools. In modern times, three major branches of Buddhism exist: the Theravada in Sri Lanka and Southeast Asia, and the Mahayana in the Himalayas and East Asia, and the Vajrayana throughout Asia and specifically in Tibet, Nepal, and Bhutan.

Maitreya (Sanskrit) or Metteyya (Pali) is a bodhisattva who is regarded as the future Buddha of this world in all schools of Buddhism, prophesied to become Maitreya Buddha or Metteyya Buddha. In some Buddhist literature, such as the Amitabha Sutra and the Lotus Sutra, he is also referred to as Ajitā (Invincible, Unconquerable). In Tibetan Buddhism he is known as the "Lord of Love" or the "Noble Loving One" (Pakpa Jampa). The root of his name is the Sanskrit word maitrī (Pali: metta; meaning friendliness, loving-kindness). The name Maitreya is also related to the Indo-Iranian name Mitra. In Hinduism, Maitreya is prophesied to be the king of Shambala, which is also the birthplace of the Kalki Avatar.

In all branches of Buddhism, Maitreya is viewed as the direct successor of Gautama Buddha. As the fifth and final Buddha of the current kalpa (eon), Maitreya's teachings will be focused around re-establishing the Buddha's Dharma on Earth. According to scriptures, Maitreya's teachings will be similar to those of Gautama (Shakyamuni). The arrival of Maitreya is prophesied to occur during an era of decline when the teachings of Gautama Buddha have been disregarded or obliviated.

A yuga, in Hinduism, is generally used to indicate an age of time.

In the Rigveda, a yuga refers to generations, a period of time (whether long or short), or a yoke (joining of two things). In the Mahabharata, the words yuga and kalpa (a day of Brahma) are used interchangeably to describe the cycle of creation and destruction.

Pralaya (Sanskrit: प्रलय, romanized: Pralaya, lit. 'Destruction') is a concept in Hindu eschatology. Generally referring to four different phenomena, it is most commonly used to indicate the event of the dissolution of the entire universe that follows a kalpa (a period of 4.32 billion years) called the Brahmapralaya.

Pralaya also refers to Nityapralaya, the continuous destruction of all animate and inanimate beings that occurs on a daily basis, Prakritapralaya, the great flood produced by Prakriti (Nature) that ends all of creation after the completion of 1,000 Chaturyuga (four-age) cycles, and Atyantikapralaya, the dissolution of one's Atman (Self) due to its union with Brahman (Ultimate Reality). A concept that has been referenced in literature since the Upanishads, the concept of pralaya has been widely discussed in Hindu cosmology as well as philosophy.

Buddhism is an ancient Indian religion and philosophy, which arose in and around the ancient Kingdom of Magadha (now Bihar, India). It is based on the teachings of Gautama Buddha, who lived in the 6th or 5th century BCE and was deemed a "Buddha" or an "Awakened One". Buddhist records in the Theravada tradition list Gautama Buddha as the fourth Buddha of our kalpa, while the next buddha will be Maitreya Buddha. Buddhism spread outside of Northern India beginning in the Buddha's lifetime.

In the 3rd century BCE and during the reign of the Mauryan Emperor Ashoka, the Buddhist community split into two schools: the Mahāsāṃghika and the Sthaviravāda, each of which spread throughout India and grew into numerous sub-schools. In modern times, three major branches of Buddhism exist: the Theravada in Sri Lanka and Southeast Asia, and the Mahayana in the Himalayas and East Asia, and the Vajrayana throughout Asia and specifically in Tibet, Nepal, and Bhutan.