{"id":"vidhyamitra:city-day:rishikesh:1972-02-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1972-02-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1972-02-13","date_display":"February 13, 1972 CE","panchanga":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1972,"month":2,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441360.770833,"kali_year":5073,"ahargana":1852895.2708,"sun":{"sidereal_longitude":300.1175,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":274.0549,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":333.9374,"elapsed_within_tithi_degrees":9.9374},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3,"moon_longitude":274.0549,"elapsed_within_degrees":7.3882},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":214.1723},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"sky":{"method":"Sūrya-Siddhāntic Bhāskara-II 4-step iteration with atan2-based śīghra + varying peripheries + lunar latitude","engine_version":"3.0 (Pūrṇa — complete SS implementation)","tradition_sources":"Āryabhaṭīya 499 CE → SS Ch.1-5 Burgess 1860 → Siddhānta-Śiromaṇi Bhāskara II 1150 → Tantrasaṅgraha Nīlakaṇṭha 1501","input":{"year":1972,"month":2,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441360.770833,"ahargana":1852895.2708,"kali_year":5073,"ayanamsa_lahiri":23.4635,"grahas":{"sun":{"sidereal_longitude":299.9655230000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":274.510223,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false,"latitude":-0.8298},"mars":{"sidereal_longitude":8.542622999999992,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":297.107923,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":248.38412300000005,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"venus":{"sidereal_longitude":340.048923,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":36.60642300000001,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":284.6918,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":104.6918,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false}},"panchang":{"method":"Sūrya Siddhānta + Bhāskara-II iterative manda + Kerala-school (Mādhava-Nīlakaṇṭha) evection + variation + annual equation","engine_version":"2.0 (Kerala-school enhanced)","accuracy_note":"Sub-degree on Moon at any Kali-Yuga date (~2-5° residual max)","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1972,"month":2,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441360.770833,"kali_year":5073,"ahargana":1852895.2708,"sun":{"sidereal_longitude":300.1175,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":274.0549,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":333.9374,"elapsed_within_tithi_degrees":9.9374},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3,"moon_longitude":274.0549,"elapsed_within_degrees":7.3882},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":214.1723},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.83,"elongation":26.063},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.83,"opposition_distance":153.937}},"eclipse_window_40days":[{"offset_days":2,"type":"solar","occurs":true,"moon_latitude":1.275,"elongation":1.087}]},"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"sunriseLocal":"07:00","sunsetLocal":"18:03","solarNoonLocal":"12:32","dayLengthHours":11.050042165275464,"dayLengthDisplay":"11 Hours 03 Mins 00 Secs","nightLengthDisplay":"12 Hours 57 Mins 00 Secs","moonriseLocal":"05:37","moonsetLocal":"16:02","rahuKala":{"name":"Rāhu Kāla","start":"16:40","end":"18:03","startHours":16.669251232988668,"endHours":18.0505065036481,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:32","end":"13:54","startHours":12.52548542101037,"endHours":13.906740691669803,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:17","end":"16:40","startHours":15.287995962329235,"endHours":16.669251232988668,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:35","end":"09:57","startHours":9.578807510270245,"endHours":9.947142249112762,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:28","end":"07:45","startHours":7.460882761925782,"endHours":7.755550552999794,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:09","end":"12:54","startHours":12.157150682167854,"endHours":12.893820159852885,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:32","end":"06:16","startHours":5.527125383002575,"endHours":6.263794860687606,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:05","end":"07:00","startHours":6.079627491266349,"endHours":7.0004643383726375,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:22","end":"15:06","startHours":14.367159115222947,"endHours":15.103828592907977,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:51","end":"18:15","startHours":17.850506503648102,"endHours":18.2505065036481,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:03","end":"18:31","startHours":18.0505065036481,"endHours":18.510924927201245,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:48","end":"19:33","startHours":17.8005065036481,"endHours":19.5505065036481,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:09","end":"00:54","startHours":24.157150682167853,"endHours":24.893820159852886,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"07:00","end":"08:23","startHours":7.0004643383726375,"endHours":8.381719609032071,"quality":"inauspicious"},{"name":"Chala","start":"08:23","end":"09:46","startHours":8.381719609032071,"endHours":9.762974879691503,"quality":"neutral"},{"name":"Labha","start":"09:46","end":"11:09","startHours":9.762974879691503,"endHours":11.144230150350936,"quality":"auspicious"},{"name":"Amṛta","start":"11:09","end":"12:32","startHours":11.144230150350936,"endHours":12.52548542101037,"quality":"auspicious"},{"name":"Kāla","start":"12:32","end":"13:54","startHours":12.52548542101037,"endHours":13.906740691669803,"quality":"inauspicious"},{"name":"Śubha","start":"13:54","end":"15:17","startHours":13.906740691669803,"endHours":15.287995962329235,"quality":"auspicious"},{"name":"Roga","start":"15:17","end":"16:40","startHours":15.287995962329235,"endHours":16.669251232988668,"quality":"inauspicious"},{"name":"Udveg","start":"16:40","end":"18:03","startHours":16.669251232988668,"endHours":18.0505065036481,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:03","end":"19:40","startHours":18.0505065036481,"endHours":19.669251232988668,"quality":"auspicious"},{"name":"Roga","start":"19:40","end":"21:17","startHours":19.669251232988668,"endHours":21.287995962329234,"quality":"inauspicious"},{"name":"Udveg","start":"21:17","end":"22:54","startHours":21.287995962329234,"endHours":22.906740691669803,"quality":"inauspicious"},{"name":"Chala","start":"22:54","end":"00:32","startHours":22.906740691669803,"endHours":24.52548542101037,"quality":"neutral"},{"name":"Labha","start":"00:32","end":"02:09","startHours":24.52548542101037,"endHours":26.144230150350936,"quality":"auspicious"},{"name":"Amṛta","start":"02:09","end":"03:46","startHours":26.144230150350936,"endHours":27.762974879691505,"quality":"auspicious"},{"name":"Kāla","start":"03:46","end":"05:23","startHours":27.762974879691505,"endHours":29.38171960903207,"quality":"inauspicious"},{"name":"Śubha","start":"05:23","end":"07:00","startHours":29.38171960903207,"endHours":31.000464338372637,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:00","end":"08:00","startHours":7.0004643383726375,"endHours":8.000464338372637,"planetary_lord":"Sun"},{"name":"Hora 2","start":"08:00","end":"09:00","startHours":8.000464338372637,"endHours":9.000464338372637,"planetary_lord":"Mars"},{"name":"Hora 3","start":"09:00","end":"10:00","startHours":9.000464338372637,"endHours":10.000464338372637,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"10:00","end":"11:00","startHours":10.000464338372637,"endHours":11.000464338372637,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"11:00","end":"12:00","startHours":11.000464338372637,"endHours":12.000464338372637,"planetary_lord":"Moon"},{"name":"Hora 6","start":"12:00","end":"13:00","startHours":12.000464338372637,"endHours":13.000464338372637,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"13:00","end":"14:00","startHours":13.000464338372637,"endHours":14.000464338372637,"planetary_lord":"Venus"},{"name":"Hora 8","start":"14:00","end":"15:00","startHours":14.000464338372637,"endHours":15.000464338372637,"planetary_lord":"Sun"},{"name":"Hora 9","start":"15:00","end":"16:00","startHours":15.000464338372637,"endHours":16.000464338372637,"planetary_lord":"Mars"},{"name":"Hora 10","start":"16:00","end":"17:00","startHours":16.000464338372637,"endHours":17.000464338372637,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"17:00","end":"18:00","startHours":17.000464338372637,"endHours":18.000464338372637,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"18:00","end":"19:00","startHours":18.000464338372637,"endHours":19.000464338372637,"planetary_lord":"Moon"},{"name":"Hora 13","start":"19:00","end":"20:00","startHours":19.000464338372637,"endHours":20.000464338372637,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"20:00","end":"21:00","startHours":20.000464338372637,"endHours":21.000464338372637,"planetary_lord":"Venus"},{"name":"Hora 15","start":"21:00","end":"22:00","startHours":21.000464338372637,"endHours":22.000464338372637,"planetary_lord":"Sun"},{"name":"Hora 16","start":"22:00","end":"23:00","startHours":22.000464338372637,"endHours":23.000464338372637,"planetary_lord":"Mars"},{"name":"Hora 17","start":"23:00","end":"00:00","startHours":23.000464338372637,"endHours":24.000464338372637,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"00:00","end":"01:00","startHours":24.000464338372637,"endHours":25.000464338372637,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"01:00","end":"02:00","startHours":25.000464338372637,"endHours":26.000464338372637,"planetary_lord":"Moon"},{"name":"Hora 20","start":"02:00","end":"03:00","startHours":26.000464338372637,"endHours":27.000464338372637,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"03:00","end":"04:00","startHours":27.000464338372637,"endHours":28.000464338372637,"planetary_lord":"Venus"},{"name":"Hora 22","start":"04:00","end":"05:00","startHours":28.000464338372637,"endHours":29.000464338372637,"planetary_lord":"Sun"},{"name":"Hora 23","start":"05:00","end":"06:00","startHours":29.000464338372637,"endHours":30.000464338372637,"planetary_lord":"Mars"},{"name":"Hora 24","start":"06:00","end":"07:00","startHours":30.000464338372637,"endHours":31.000464338372637,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-13.708142435150483,"eotMinutes":-14.599525260622107,"ayanamsa":23.4635}},"calendars":{"vikram_samvat":2029,"vikram_samvatsara":"Krodhana","saka_samvat":1894,"saka_samvatsara":"Paridhāvi","bengali_samvat":1379,"malayalam_era":1148,"nanakshahi_year":503,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Trayodaśī · Vikram 2029 Krodhana · Śaka 1894 Paridhāvi"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2},{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"rishikesh"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 13, 1972 CE · Ṛṣikeśa · Vidhyamitra","description":"February 13, 1972 CE for Ṛṣikeśa: Kṛṣṇa Trayodaśī, sūryodaya 07:00, sūryāsta 18:03.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1972-02-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1972-02-13","sa":"https://sa.vidhyamitra.com/city/rishikesh/1972-02-13","hi":"https://hi.vidhyamitra.com/city/rishikesh/1972-02-13","x-default":"https://vidhyamitra.com/city/rishikesh/1972-02-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-19T12:13:41.028Z","verification":{"type":"multi-marker","confidence":"canonical"}},{"pillar":"Vidhyamitra-Tier2","pillar_version":"0.1.0","method":"Spherical astronomy + Lahiri ayanamsa + standard solar declination + EoT correction","retrieved_at":"2026-05-19T12:13:41.028Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-19T12:13:41.028Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}