{"id":"vidhyamitra:city-day:jamnagar:1981-04-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/jamnagar/1981-04-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-04-21","date_display":"April 21, 1981 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":1981,"month":4,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444715.770833,"kali_year":5083,"ahargana":1856250.2708,"sun":{"sidereal_longitude":7.4156,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":208.4926,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":201.077,"elapsed_within_tithi_degrees":9.077},"nakshatra":{"number":16,"name":"Viśākhā","pada":3,"moon_longitude":208.4926,"elapsed_within_degrees":8.4926},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":215.9083},"karana":{"half_tithi_index":33,"name":"Gara"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":1981,"month":4,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444715.770833,"ahargana":1856250.2708,"kali_year":5083,"ayanamsa_lahiri":23.5918,"grahas":{"sun":{"sidereal_longitude":7.266137000000015,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":205.959837,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false,"latitude":4.4085},"mars":{"sidereal_longitude":3.4519369999999867,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":359.991637,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":158.93573700000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":11.070037000000013,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":160.78613700000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":106.9277,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":286.9277,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"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":1981,"month":4,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444715.770833,"kali_year":5083,"ahargana":1856250.2708,"sun":{"sidereal_longitude":7.4156,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":208.4926,"rashi":7,"rashi_name":"Tulā"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":201.077,"elapsed_within_tithi_degrees":9.077},"nakshatra":{"number":16,"name":"Viśākhā","pada":3,"moon_longitude":208.4926,"elapsed_within_degrees":8.4926},"yoga":{"number":17,"name":"Vyatīpāta","sum_longitude":215.9083},"karana":{"half_tithi_index":33,"name":"Gara"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.408,"elongation":158.923},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.408,"opposition_distance":21.077}},"eclipse_window_40days":[]},"city":{"slug":"jamnagar","name":"Jamnagar, Gujarat","lat":22.4707,"lon":70.0577,"tz_offset_hours":5.5,"state":"Gujarat","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"jamnagar","name":"Jamnagar, Gujarat","lat":22.4707,"lon":70.0577,"tz_offset_hours":5.5,"state":"Gujarat","country":"IN","tier":"tier-1"},"sunriseLocal":"06:25","sunsetLocal":"19:12","solarNoonLocal":"12:49","dayLengthHours":12.782584700666577,"dayLengthDisplay":"12 Hours 46 Mins 57 Secs","nightLengthDisplay":"11 Hours 13 Mins 03 Secs","moonriseLocal":"20:31","moonsetLocal":"07:36","rahuKala":{"name":"Rāhu Kāla","start":"16:00","end":"17:36","startHours":16.00534402781394,"endHours":17.603167115397262,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:37","end":"11:13","startHours":9.614051677480651,"endHours":11.211874765063975,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:49","end":"14:24","startHours":12.809697852647297,"endHours":14.407520940230619,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:24","end":"09:50","startHours":9.401008599136208,"endHours":9.827094755825094,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:57","end":"07:18","startHours":6.951013198175114,"endHours":7.291882123526223,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:23","end":"13:14","startHours":12.383611695958411,"endHours":13.235784009336182,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:43","end":"05:34","startHours":4.714060875558464,"endHours":5.566233188936235,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:21","end":"06:25","startHours":5.353190110591792,"endHours":6.418405502314007,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:56","end":"15:48","startHours":14.940128636091725,"endHours":15.792300949469496,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:00","end":"19:24","startHours":19.000990202980585,"endHours":19.400990202980584,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:12","end":"19:44","startHours":19.200990202980584,"endHours":19.73359789884169,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:57","end":"20:42","startHours":18.950990202980584,"endHours":20.700990202980584,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:23","end":"01:14","startHours":24.38361169595841,"endHours":25.235784009336182,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:25","end":"08:01","startHours":6.418405502314007,"endHours":8.01622858989733,"quality":"inauspicious"},{"name":"Udveg","start":"08:01","end":"09:37","startHours":8.01622858989733,"endHours":9.614051677480651,"quality":"inauspicious"},{"name":"Chala","start":"09:37","end":"11:13","startHours":9.614051677480651,"endHours":11.211874765063975,"quality":"neutral"},{"name":"Labha","start":"11:13","end":"12:49","startHours":11.211874765063975,"endHours":12.809697852647297,"quality":"auspicious"},{"name":"Amṛta","start":"12:49","end":"14:24","startHours":12.809697852647297,"endHours":14.407520940230619,"quality":"auspicious"},{"name":"Kāla","start":"14:24","end":"16:00","startHours":14.407520940230619,"endHours":16.00534402781394,"quality":"inauspicious"},{"name":"Śubha","start":"16:00","end":"17:36","startHours":16.00534402781394,"endHours":17.603167115397262,"quality":"auspicious"},{"name":"Roga","start":"17:36","end":"19:12","startHours":17.603167115397262,"endHours":19.200990202980584,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"19:12","end":"20:36","startHours":19.200990202980584,"endHours":20.603167115397262,"quality":"inauspicious"},{"name":"Śubha","start":"20:36","end":"22:00","startHours":20.603167115397262,"endHours":22.00534402781394,"quality":"auspicious"},{"name":"Roga","start":"22:00","end":"23:24","startHours":22.00534402781394,"endHours":23.40752094023062,"quality":"inauspicious"},{"name":"Udveg","start":"23:24","end":"00:49","startHours":23.40752094023062,"endHours":24.809697852647297,"quality":"inauspicious"},{"name":"Chala","start":"00:49","end":"02:13","startHours":24.809697852647297,"endHours":26.211874765063975,"quality":"neutral"},{"name":"Labha","start":"02:13","end":"03:37","startHours":26.211874765063975,"endHours":27.614051677480653,"quality":"auspicious"},{"name":"Amṛta","start":"03:37","end":"05:01","startHours":27.614051677480653,"endHours":29.01622858989733,"quality":"auspicious"},{"name":"Kāla","start":"05:01","end":"06:25","startHours":29.01622858989733,"endHours":30.41840550231401,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:25","end":"07:25","startHours":6.418405502314007,"endHours":7.418405502314007,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:25","end":"08:25","startHours":7.418405502314007,"endHours":8.418405502314007,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:25","end":"09:25","startHours":8.418405502314007,"endHours":9.418405502314007,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:25","end":"10:25","startHours":9.418405502314007,"endHours":10.418405502314007,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:25","end":"11:25","startHours":10.418405502314007,"endHours":11.418405502314007,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:25","end":"12:25","startHours":11.418405502314007,"endHours":12.418405502314007,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:25","end":"13:25","startHours":12.418405502314007,"endHours":13.418405502314007,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:25","end":"14:25","startHours":13.418405502314007,"endHours":14.418405502314007,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:25","end":"15:25","startHours":14.418405502314007,"endHours":15.418405502314007,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:25","end":"16:25","startHours":15.418405502314007,"endHours":16.41840550231401,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:25","end":"17:25","startHours":16.41840550231401,"endHours":17.41840550231401,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:25","end":"18:25","startHours":17.41840550231401,"endHours":18.41840550231401,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:25","end":"19:25","startHours":18.41840550231401,"endHours":19.41840550231401,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:25","end":"20:25","startHours":19.41840550231401,"endHours":20.41840550231401,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:25","end":"21:25","startHours":20.41840550231401,"endHours":21.41840550231401,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:25","end":"22:25","startHours":21.41840550231401,"endHours":22.41840550231401,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:25","end":"23:25","startHours":22.41840550231401,"endHours":23.41840550231401,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:25","end":"00:25","startHours":23.41840550231401,"endHours":24.41840550231401,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:25","end":"01:25","startHours":24.41840550231401,"endHours":25.41840550231401,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:25","end":"02:25","startHours":25.41840550231401,"endHours":26.41840550231401,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:25","end":"03:25","startHours":26.41840550231401,"endHours":27.41840550231401,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:25","end":"04:25","startHours":27.41840550231401,"endHours":28.41840550231401,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:25","end":"05:25","startHours":28.41840550231401,"endHours":29.41840550231401,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:25","end":"06:25","startHours":29.41840550231401,"endHours":30.41840550231401,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Tulā","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Vṛścika","Makara","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"North","rahuVasa":"North","anandadiYoga":{"name":"Mātaṇga","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":11.771049627715898,"eotMinutes":1.1873288411622274,"ayanamsa":23.5918}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Kṛṣṇa Dvitīyā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Viśākhā","url":"/day/-0562-04-11","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"jamnagar"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 21, 1981 CE · Jamnagar, Gujarat · Vidhyamitra","description":"April 21, 1981 CE for Jamnagar, Gujarat: Kṛṣṇa Dvitīyā, sūryodaya 06:25, sūryāsta 19:12.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/jamnagar/1981-04-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/jamnagar/1981-04-21","sa":"https://sa.vidhyamitra.com/city/jamnagar/1981-04-21","hi":"https://hi.vidhyamitra.com/city/jamnagar/1981-04-21","x-default":"https://vidhyamitra.com/city/jamnagar/1981-04-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T14:26:22.490Z","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":"2026-05-31T14:26:22.490Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T14:26:22.490Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}