If that is also exceeded, then Prāyaścitta arghya (i.e. If sunrise and sunset are 6AM and 6PM, then the three sandhyas can be performed until 8.24AM, 1.48PM, 8.24PM, respectively. Likewise, Sāyamsandhyā should be finished before end of pradosha. In other words, Prātassandhyā and Madhyāhnasandhyā and should be finished before onset of pūrvahna and aparāhna respectively. In case, it is not possible to do sandhyā in this time, a grace period ( gauṇakāla) of 2 hours after end of original span ( mukhyakāla) of sandhyā is allowed. Similarly, Madhyāhnasandhyā time starts from 11.24AM (until 12.36PM). Suppose, sunrise and sunset are 6AM and 6PM, then Prātassandhyā and Sāyamsandhyā times starts from 5.12AM (until 6.24AM) and 5.36PM (until 6.48PM) respectively.
But, while chanting, it ought to be chanted as vareṇyam only. When counting the letters, the word vareṇyam (वरेण्यं) is treated as vareṇiyam (वरेणियं). The five heads represent 5 among the Vedangas, namely, vyākaraṇa, śikṣā, kalpa, nirukta and jyotiṣa. The six bellies are supposed to represent 4 cardinal directions, along with the two more directions, Ūrdhva ( Zenith) and Adhara ( Nadir). Taittirīya Sandhya Bhāṣyam of Sri Krishna Pandita mentions that the three feet of Gayatri is supposed to represent the first 3 vedas (Ṛk, Yajus, Sāma). of Krishna Yajurveda, Gayatri is described as white-colored ( Sanskrit: श्वेतवर्णा, śvetavarṇā), having the gotra of sage viswamitra ( Sanskrit: सान्ख्यायनस गोत्रा, sānkhyāyanasa gotrā), composed of 24 letters ( Sanskrit: चतुर्विंशत्यक्षरा, caturviṃśatyakṣarā), three-footed ( Sanskrit: त्रिपदा, tripadā), six-bellied ( Sanskrit: षट्कुक्षिः, ṣaṭkukṣiḥ), five-headed ( Sanskrit: पञ्चशीर्षः, pañcaśīrṣaḥ) and the one used in Upanayana of dvijas ( Sanskrit: उपनयने विनियोगः, upanayane viniyogaḥ). Īśvarī kevalā śaktistattvatraya samudbhavāĭhyātvā'rkamaṇḍalagatāṃ sāvitrīṃ vai japedbudhaḥ Description of Gayatri Yā sandhyā sā jagatsūtirmāyātītā hi niṣkalā Ī praise of sandhya devata is given below Sir Monier-Williams offer the meaning of saṃdhyā as juncture of the two divisions of the day (morning and evening) and also defined as "the religious acts performed by Brahmans and twice-born men at the above three divisions of the day". These rituals are performed three times a day - at morning ( prātassaṃdhyā), noon ( mādhyāhnika) and evening ( sāyaṃsaṃdhyā). Thus, the Sandhyāvandanam consists of recitation from the Vedas, accompanied by ritual. Sarasvatī ca sāyāhne saiva sandhyā trishu smṛtā Gāyatrī nāma purvāhne sāvatrī madhyame dine Ī definition from scriptures is given below
Three forms of Sandhyā devata (Brāhmi, Raudri, Vaiṣṇavi) along with Praṇava Rishi.