{"id":"vidhyamitra:city-day:rishikesh:1973-02-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1973-02-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1973-02-21","date_display":"February 21, 1973 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":1973,"month":2,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441734.770833,"kali_year":5074,"ahargana":1853269.2708,"sun":{"sidereal_longitude":308.9801,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":174.5495,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":225.5694,"elapsed_within_tithi_degrees":9.5694},"nakshatra":{"number":14,"name":"Citrā","pada":1,"moon_longitude":174.5495,"elapsed_within_degrees":1.2161},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":123.5295},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":1973,"month":2,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441734.770833,"ahargana":1853269.2708,"kali_year":5074,"ayanamsa_lahiri":23.4778,"grahas":{"sun":{"sidereal_longitude":308.79013299999997,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":173.24433299999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false,"latitude":-4.4999},"mars":{"sidereal_longitude":253.02883300000008,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":326.0602329999999,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":276.521033,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":297.262333,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":50.478432999999995,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":264.8755,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":84.8755,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"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":1973,"month":2,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441734.770833,"kali_year":5074,"ahargana":1853269.2708,"sun":{"sidereal_longitude":308.9801,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":174.5495,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":225.5694,"elapsed_within_tithi_degrees":9.5694},"nakshatra":{"number":14,"name":"Citrā","pada":1,"moon_longitude":174.5495,"elapsed_within_degrees":1.2161},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":123.5295},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.5,"elongation":134.431},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.5,"opposition_distance":45.569}},"eclipse_window_40days":[]},"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":"06:52","sunsetLocal":"18:10","solarNoonLocal":"12:31","dayLengthHours":11.296035411804318,"dayLengthDisplay":"11 Hours 17 Mins 46 Secs","nightLengthDisplay":"12 Hours 42 Mins 14 Secs","moonriseLocal":"21:42","moonsetLocal":"09:16","rahuKala":{"name":"Rāhu Kāla","start":"12:31","end":"13:56","startHours":12.518657372353939,"endHours":13.930661798829478,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:17","end":"09:42","startHours":8.282644092927319,"endHours":9.694648519402858,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"11:06","end":"12:31","startHours":11.106652945878398,"endHours":12.518657372353939,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:30","end":"09:53","startHours":9.506381262539453,"endHours":9.882915776266264,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:20","end":"07:39","startHours":7.341307808610292,"endHours":7.6425354195917405,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:09","end":"12:54","startHours":12.142122858627129,"endHours":12.895191886080749,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:22","end":"06:07","startHours":5.3645016115445365,"endHours":6.117570638998157,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:56","end":"06:52","startHours":5.929303382134752,"endHours":6.870639666451779,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:24","end":"15:09","startHours":14.401329940987992,"endHours":15.154398968441614,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:58","end":"18:22","startHours":17.9666750782561,"endHours":18.366675078256097,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:10","end":"18:38","startHours":18.166675078256098,"endHours":18.63734322041461,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:55","end":"19:40","startHours":17.916675078256098,"endHours":19.666675078256098,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:09","end":"00:54","startHours":24.14212285862713,"endHours":24.89519188608075,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:52","end":"08:17","startHours":6.870639666451779,"endHours":8.282644092927319,"quality":"auspicious"},{"name":"Amṛta","start":"08:17","end":"09:42","startHours":8.282644092927319,"endHours":9.694648519402858,"quality":"auspicious"},{"name":"Kāla","start":"09:42","end":"11:06","startHours":9.694648519402858,"endHours":11.106652945878398,"quality":"inauspicious"},{"name":"Śubha","start":"11:06","end":"12:31","startHours":11.106652945878398,"endHours":12.518657372353939,"quality":"auspicious"},{"name":"Roga","start":"12:31","end":"13:56","startHours":12.518657372353939,"endHours":13.930661798829478,"quality":"inauspicious"},{"name":"Udveg","start":"13:56","end":"15:21","startHours":13.930661798829478,"endHours":15.342666225305017,"quality":"inauspicious"},{"name":"Chala","start":"15:21","end":"16:45","startHours":15.342666225305017,"endHours":16.754670651780557,"quality":"neutral"},{"name":"Labha","start":"16:45","end":"18:10","startHours":16.754670651780557,"endHours":18.166675078256098,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:10","end":"19:45","startHours":18.166675078256098,"endHours":19.754670651780557,"quality":"inauspicious"},{"name":"Chala","start":"19:45","end":"21:21","startHours":19.754670651780557,"endHours":21.342666225305017,"quality":"neutral"},{"name":"Labha","start":"21:21","end":"22:56","startHours":21.342666225305017,"endHours":22.93066179882948,"quality":"auspicious"},{"name":"Amṛta","start":"22:56","end":"00:31","startHours":22.93066179882948,"endHours":24.51865737235394,"quality":"auspicious"},{"name":"Kāla","start":"00:31","end":"02:06","startHours":24.51865737235394,"endHours":26.1066529458784,"quality":"inauspicious"},{"name":"Śubha","start":"02:06","end":"03:42","startHours":26.1066529458784,"endHours":27.69464851940286,"quality":"auspicious"},{"name":"Roga","start":"03:42","end":"05:17","startHours":27.69464851940286,"endHours":29.28264409292732,"quality":"inauspicious"},{"name":"Udveg","start":"05:17","end":"06:52","startHours":29.28264409292732,"endHours":30.87063966645178,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:52","end":"07:52","startHours":6.870639666451779,"endHours":7.870639666451779,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:52","end":"08:52","startHours":7.870639666451779,"endHours":8.87063966645178,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:52","end":"09:52","startHours":8.87063966645178,"endHours":9.87063966645178,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:52","end":"10:52","startHours":9.87063966645178,"endHours":10.87063966645178,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:52","end":"11:52","startHours":10.87063966645178,"endHours":11.87063966645178,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:52","end":"12:52","startHours":11.87063966645178,"endHours":12.87063966645178,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:52","end":"13:52","startHours":12.87063966645178,"endHours":13.87063966645178,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:52","end":"14:52","startHours":13.87063966645178,"endHours":14.87063966645178,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:52","end":"15:52","startHours":14.87063966645178,"endHours":15.87063966645178,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:52","end":"16:52","startHours":15.87063966645178,"endHours":16.87063966645178,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:52","end":"17:52","startHours":16.87063966645178,"endHours":17.87063966645178,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:52","end":"18:52","startHours":17.87063966645178,"endHours":18.87063966645178,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:52","end":"19:52","startHours":18.87063966645178,"endHours":19.87063966645178,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:52","end":"20:52","startHours":19.87063966645178,"endHours":20.87063966645178,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:52","end":"21:52","startHours":20.87063966645178,"endHours":21.87063966645178,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:52","end":"22:52","startHours":21.87063966645178,"endHours":22.87063966645178,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:52","end":"23:52","startHours":22.87063966645178,"endHours":23.87063966645178,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:52","end":"00:52","startHours":23.87063966645178,"endHours":24.87063966645178,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:52","end":"01:52","startHours":24.87063966645178,"endHours":25.87063966645178,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:52","end":"02:52","startHours":25.87063966645178,"endHours":26.87063966645178,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:52","end":"03:52","startHours":26.87063966645178,"endHours":27.87063966645178,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:52","end":"04:52","startHours":27.87063966645178,"endHours":28.87063966645178,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:52","end":"05:52","startHours":28.87063966645178,"endHours":29.87063966645178,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:52","end":"06:52","startHours":29.87063966645178,"endHours":30.87063966645178,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"North (Uttara)","chandraVasa":"North-West","rahuVasa":"South-West","anandadiYoga":{"name":"Cara","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-10.665786768872639,"eotMinutes":-14.189842341236304,"ayanamsa":23.4778}},"calendars":{"vikram_samvat":2030,"vikram_samvatsara":"Akṣaya","saka_samvat":1895,"saka_samvatsara":"Pramādī","bengali_samvat":1380,"malayalam_era":1149,"nanakshahi_year":504,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Caturthī · Vikram 2030 Akṣaya · Śaka 1895 Pramādī"},"festivals":[{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — 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 21, 1973 CE · Ṛṣikeśa · Vidhyamitra","description":"February 21, 1973 CE for Ṛṣikeśa: Kṛṣṇa Caturthī, sūryodaya 06:52, sūryāsta 18:10.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1973-02-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1973-02-21","sa":"https://sa.vidhyamitra.com/city/rishikesh/1973-02-21","hi":"https://hi.vidhyamitra.com/city/rishikesh/1973-02-21","x-default":"https://vidhyamitra.com/city/rishikesh/1973-02-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T00:29:13.018Z","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":"2026-06-01T00:29:13.018Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T00:29:13.018Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}