Prahara is a Sanskrit term for a unit of time, or subdivision of the day, approximately three hours long. [1]
The day is divided into eight parts: four praharas for the day, and four for the night. The first prahara of the day begins at sunrise, and the fourth prahara of the day ends at sunset. A second round of four praharas unfolds during the night, between sunset and sunrise.
The traditional system of praharas overlaps with the traditional system of muhurtas also, which is based on precise astronomical calculations.
Thus, the day can be regarded as divided into eight praharas (of three hours each) or thirty muhurtas (of 48 minutes each). In both systems, the day commences with sunrise. The timing of the two systems coincides only at sunrise and sunset (four praharas coincide with fifteen muhurtas at the twelve-hour, or 720-minute, point).
In the ancient Puranas, the day is divided into eight praharas: four for the day and four for the night. [2] The concept still prevails today in India, particularly in connection with the performance of Indian classical music (see below).
The first prahara is commonly placed at sunrise, although some sources place it at the brahma-muhurta, a period of time before sunrise (around 4.30 am when Venus can be sighted). [3]
The concept of prahar originated where the lengths of the day and night were based on actual, observable sunrise and sunset. The four praharas of the day start at sunrise, and the four praharas of the night at sunset. If the location is near the equator, where day and night are the same length year round, the praharas of the day and the praharas of the night will be of equal length (three hours each). In other regions, where the relative length of day and night varies according to the season, the praharas of the day will be longer or shorter than the praharas of the night.
Contemporary discussions of prahara often use 7:00 am (the time of sunrise at the equator and at the equinoxes) as a theoretical fixed point of reference for mapping out the praharas at three-hour intervals (7-10, 10–1, etc.). This scheme is a useful pedagogical tool and an efficient way of applying the concept of prahara in a technological "clock" culture. However, this rigid schema most likely does not capture the original application of prahara. In a traditional, non-technological culture, the length of day and night are based on observable sunrise and sunset. The day, which starts at sunrise and ends at sunset, is divided into four praharas of equal length; and, the night, which starts at sunset and ends at sunrise, is also divided into four equal watches. During the summer, when the days are longer than the nights, the praharas of the day will be longer than the praharas of the night, and vice versa during the winter. [4]
The question of how to handle the praharas when days and nights are unequal in length is critical for timing the performance of ragas, since each raga is ideally performed during a certain prahara.
Based on the contemporary operational concept of prahara based on the hour or time of day the following scheme has been in use for sometime in performing rituals in most of India east of Bengal:
While it is considered that there are 4 Praharas in the night, in practice with the inclusion of Brahmi Muhoorta into the Day hours, there are 5 praharas during the day and 3 during the night in contemporary life, each of 3 hours, and this seems to be the convention in practice irrespective of what the theories in books say. Besides, the sun rises before 7.00am on almost all days of the year in most of Bhaarat bhumi (Indian sub-continent) based on the Indian Standard Time (IST). Furthermore, humans who are not babies, on average, sleep for fewer hours than 12 in any given day, independent of seasons.
This is the typical schedule in the contemporary life of people in India (Bharat) subject to the length of the day as per season. Everyone is not required to follow this scheme and many do not. Also, some people may skip certain rituals or perform other activities as is suitable for them. Brahmi Muhoorta is considered the time the gods/devas appear to bless humans, and hence a special significance is attached to this prahara before sunrise. People from the north-east of India start their day much earlier because sun rises in those parts as early as 4.30am IST and sets as early as 5pm IST in some seasons, however, this does not contradict the contemporary operational scheme in practice.
Some ragas of the Indian classical music are prescribed to be performed at a particular prahara to maximize their aesthetic effects (see samayā). Perhaps the earliest mention of the relation between raga and time is Narada's Sangita Makaranda, written sometime between the 7th and 11th century, which warns musicians against playing ragas at the incorrect time of day. [5] Pandit V.N. Bhatkhande (1860-1936), who formulated the modern system of Indian musical thāt, states that the correct time (or prahara) to play a raga has a relation to its thāt. [6]
The word commonly used in India, Pakistan, Nepal is prahar (Hindi/Nepali प्रहर, Urduپہر), more commonly pronounced paher or peher and in West Bengal and Bangladesh is prohor (Bengali প্রহর) in Marathi it is pronounced as Prahar (प्रहर). In Hindi and Urdu the word for "afternoon" is dopahar (= two prahars). [7] In Bengali the corresponding word is dui-pôhor or more commonly dupur. In Marathi, afternoon is Dupaar with same etymology as in Hindi. It is known as Paar in, Konkani, where First Prahara is known as Faantya Paar (from Sanskrit, प्रातः प्रहर), and afternoon is known as Donpaar.
A day is the time period of a full rotation of the Earth with respect to the Sun. On average, this is 24 hours. As a day passes at a given location it experiences morning, noon, afternoon, evening, and night. This daily cycle drives circadian rhythms in many organisms, which are vital to many life processes.
An hour is a unit of time historically reckoned as 1⁄24 of a day and defined contemporarily as exactly 3,600 seconds (SI). There are 60 minutes in an hour, and 24 hours in a day.
Dawn is the time that marks the beginning of twilight before sunrise. It is recognized by the appearance of indirect sunlight being scattered in Earth's atmosphere, when the centre of the Sun's disc has reached 18° below the observer's horizon. This morning twilight period will last until sunrise, when direct sunlight outshines the diffused light.
The Hindu calendar, also called Panchanga, is one of various lunisolar calendars that are traditionally used in the Indian subcontinent and Southeast Asia, with further regional variations for social and Hindu religious purposes. They adopt a similar underlying concept for timekeeping based on sidereal year for solar cycle and adjustment of lunar cycles in every three years, but differ in their relative emphasis to moon cycle or the sun cycle and the names of months and when they consider the New Year to start. Of the various regional calendars, the most studied and known Hindu calendars are the Shalivahana Shaka found in the Deccan region of Southern India and the Vikram Samvat (Bikrami) found in Nepal and the North and Central regions of India – both of which emphasize the lunar cycle. Their new year starts in spring. In regions such as Tamil Nadu and Kerala, the solar cycle is emphasized and this is called the Tamil calendar and Malayalam calendar and these have origins in the second half of the 1st millennium CE. A Hindu calendar is sometimes referred to as Panchangam (पञ्चाङ्गम्), which is also known as Panjika in Eastern India.
In Vedic timekeeping, a tithi is a "duration of two faces of moon that is observed from earth", known as milа̄lyа̄ in Nepal Bhasa, or the time it takes for the longitudinal angle between the Moon and the Sun to increase by 12°. In other words, a tithi is a time duration between the consecutive epochs that correspond to when the longitudinal angle between the Sun and the Moon is an integer multiple of 12°. Tithis begin at varying times of day and vary in duration approximately from 19 to 26 hours. Every day of a lunar month is called tithi.
Muhūrta is a Hindu unit of time along with nimiṣa, kāṣṭhā, and kalā in the Hindu calendar.
Twilight is sunlight illumination produced by diffuse sky radiation when the Sun is below the horizon as sunlight from the upper atmosphere is scattered in a way that illuminates both the Earth's lower atmosphere and also the Earth's surface. Twilight can also refer to the periods when this illumination occurs.
Brahma Temple, Pushkar is a Hindu temple situated at Pushkar in the Indian state of Rajasthan, close to the sacred Pushkar Lake to which its legend has an indelible link.
Hindu units of time are described in Hindu texts ranging from microseconds to trillions of years, including cycles of cosmic time that repeat general events in Hindu cosmology. Time is described as eternal. Various fragments of time are described in the Vedas, Manusmriti, Bhagavata Purana, Vishnu Purana, Mahabharata, Surya Siddhanta etc.
Sohini is a raga in Hindustani classical music in the Marwa thaat. Alternate transliterations include Sohani and Sohni. Like Bahar, it is a small raga, with not much space for elaboration. It emotes the feel of longing, of passive sensuousness.
Gaurabda is the name of the moon calendar used by Gaudiya Vaishnavism as part of the liturgy.
Lalit is a prominent raga in Hindustani classical music. It is commonly described as serene and devotional and is performed at dawn time of the day.
Brahmamuhurta is a 48-minute period (muhurta) that begins one hour and 36 minutes before sunrise, and ends 48 minutes before sunrise. It is traditionally the penultimate phase or muhurta of the night, and is considered an auspicious time for all practices of yoga and most appropriate for meditation, worship or any other religious practice. Spiritual activities performed early in the morning are said to have a greater effect than in any other part of the day.
Choghadiya refers to an auspicious period of ninety-eight minutes in Indian astrology.
Pahar, which is more commonly pronounced peher is a traditional unit of time used in India, Pakistan, and Bangladesh. One pahar nominally equals three hours, and there are eight pahars in a day. In India, the measure is primarily used in North India and by Hindi-speaking communities throughout the Deccan in Southern India.
In Roman timekeeping, a day was divided into periods according to the available technology. Initially, the day was divided into two parts: the ante meridiem and the post meridiem. With the introduction of the Greek sundial to Rome from the Samnites circa 293 BC, the period of the natural day from sunrise to sunset was divided into twelve hours.
Jogiya, or Jogia, is a raga in Hindustani classical music. It is based on Bhairav Thaat. It is played at the 1st Prahar of the day, dawn time. The name Jogiya came from Jogi, a colloquial version of the word yogi.
Relative hour, sometimes called halachic hour, temporal hour, seasonal hour and variable hour, is a term used in rabbinic Jewish law that assigns 12 hours to each day and 12 hours to each night, all throughout the year. A relative hour has no fixed length in absolute time, but changes with the length of daylight each day - depending on summer, and in winter. Even so, in all seasons a day is always divided into 12 hours, and a night is always divided into 12 hours, which invariably makes for a longer hour or a shorter hour. At Mediterranean latitude, one hour can be about 45 minutes at the winter solstice, and 75 minutes at summer solstice. All of the hours mentioned by the Sages in either the Mishnah or Talmud, or in other rabbinic writings, refer strictly to relative hours.
The Hindu calendar is based on a geocentric model of the Solar System. A geocentric model describes the Solar System as seen by an observer on the surface of the Earth.
In Indian astronomy, a karaṇa is a half of a tithi. It is the duration of time in which the difference of the longitudes of the Sun and the Moon is increased by 6 degrees. A lunar month has 30 tithi-s and so the number of karaṇa-s in a lunar month is 60. These sixty karaṇa-s are not individually named. Instead, the originators of the concept have chosen 11 names to be associated with the karaṇa-s which means several karaṇa-s will be associated with the same name. Of these 11 names, four are fixed or immovables in the sense that they are associated with four unique karaṇa-s in a lunar month. These constant names are Śakuni, Catuṣpāda, Nāga and Kimstughna. The remaining seven names are variable or movable in the sense that there are several karaṇa-s associated with each of them. These names are Bava, Bālava, Kaulava, Taitila, Gara, Vaṇij and Vṛṣṭi.