Analysis of information sources in references of the Wikipedia article "Pahar" in Vietnamese language version.
... pahar (period of three hours)...
... pahars, or watches, of which the second terminated at noon; hence, do-pahar-din, mid-day... do-pahar-rat, midnight... in the north of India, the pahar must have varied from three and a-half hours about the summer solstice, to two and a-half in winter, the pahars of the night varying inversely...
... they vary in length at different times of the year, but at the equinox the pahars of the day and night are equal, each being three hours long. In traditional Hindu society(as in of time when Sanatan Dharma was only major religion in Indian Subcontinent), each prahar was associated with certain task or Karma, which were to be finished in that prahar only. Each varna had specified karma in which at least one prahar(mostly first or last day prahar) was dedicated to sadhna(God worship). Dopahar means midday; pahar din raha=3 PM; pahar rat gai=9 PM; pahar din charha=9 AM...
... पहला पहर = प्रातःकाल...
... midday dopahar दोपहर्...
... kal seh pahar ko: yesterday evening...
