The correspondence of traditional Indian units of time to the modern western units of time is given below. We can find the names of some of the Indian time period in the second Shabad of Sohila Sahib: ਵਿਸੁਏ ਚਸਿਆ ਘੜੀਆ ਪਹਰਾ ਥਿਤੀ ਵਾਰੀ ਮਾਹੁ ਹੋਆ ॥ (Guru Granth Sahib, p. 12) Day = 8 Pahars = 24 hrs 1 Pahar = 8 Gharis = 3hrs 1 Ghari = 60 Pal = 22.5 minutes = 1350 secs 1Pal = 3 Chassa = 22.5 secs 1 Chassa = 15 Visuas = 7.5 secs 1 Visua = 15 Nimakh = 0.5 secs 1 Nimakh = 0.0333 secs. Hindus and Sikhs by convention take a day to begin at sunrise to sunset. Muslims on the other hand consider period on a day to begin at sunset and end at the next sunset. The Christian day begins at midnight and ends at the following midnight."