{"id":"vidhyamitra:city-day:noida:1981-04-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/noida/1981-04-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-04-04","date_display":"April 4, 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":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444698.770833,"kali_year":5082,"ahargana":1856233.2708,"sun":{"sidereal_longitude":350.804,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":339.111,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":348.307,"elapsed_within_tithi_degrees":0.307},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2,"moon_longitude":339.111,"elapsed_within_degrees":5.7777},"yoga":{"number":25,"name":"Brahma","sum_longitude":329.9151},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444698.770833,"ahargana":1856233.2708,"kali_year":5082,"ayanamsa_lahiri":23.5912,"grahas":{"sun":{"sidereal_longitude":350.599987,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":339.373887,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2},"retrograde":false,"latitude":-3.5097},"mars":{"sidereal_longitude":350.526787,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":329.519687,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":160.871987,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"venus":{"sidereal_longitude":350.029687,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":162.02038700000003,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":107.8285,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":287.8285,"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":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444698.770833,"kali_year":5082,"ahargana":1856233.2708,"sun":{"sidereal_longitude":350.804,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":339.111,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":348.307,"elapsed_within_tithi_degrees":0.307},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":2,"moon_longitude":339.111,"elapsed_within_degrees":5.7777},"yoga":{"number":25,"name":"Brahma","sum_longitude":329.9151},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.51,"elongation":11.693},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.51,"opposition_distance":168.307}},"eclipse_window_40days":[]},"city":{"slug":"noida","name":"Noida, Uttar Pradesh","lat":28.5355,"lon":77.391,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"noida","name":"Noida, Uttar Pradesh","lat":28.5355,"lon":77.391,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tier-1"},"sunriseLocal":"06:08","sunsetLocal":"18:40","solarNoonLocal":"12:24","dayLengthHours":12.53444702638215,"dayLengthDisplay":"12 Hours 32 Mins 04 Secs","nightLengthDisplay":"11 Hours 27 Mins 56 Secs","moonriseLocal":"05:34","moonsetLocal":"17:44","rahuKala":{"name":"Rāhu Kāla","start":"09:16","end":"10:50","startHours":9.263715295053299,"endHours":10.830521173351066,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:58","end":"15:32","startHours":13.964132929946604,"endHours":15.530938808244372,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:08","end":"07:42","startHours":6.130103538457761,"endHours":7.696909416755529,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:03","end":"09:28","startHours":9.054807844613595,"endHours":9.472622745493002,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:39","end":"06:59","startHours":6.6523721645570175,"endHours":6.986624085260542,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:59","end":"12:49","startHours":11.97951215076943,"endHours":12.81514195252824,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:28","end":"05:18","startHours":4.458843934940141,"endHours":5.294473736698951,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:05","end":"06:08","startHours":5.085566286259249,"endHours":6.130103538457761,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:29","end":"15:19","startHours":14.486401556045859,"endHours":15.322031357804669,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:28","end":"18:52","startHours":18.46455056483991,"endHours":18.86455056483991,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:40","end":"19:11","startHours":18.66455056483991,"endHours":19.186819190939165,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:25","end":"20:10","startHours":18.41455056483991,"endHours":20.16455056483991,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:59","end":"00:49","startHours":23.97951215076943,"endHours":24.815141952528244,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:08","end":"07:42","startHours":6.130103538457761,"endHours":7.696909416755529,"quality":"inauspicious"},{"name":"Śubha","start":"07:42","end":"09:16","startHours":7.696909416755529,"endHours":9.263715295053299,"quality":"auspicious"},{"name":"Roga","start":"09:16","end":"10:50","startHours":9.263715295053299,"endHours":10.830521173351066,"quality":"inauspicious"},{"name":"Udveg","start":"10:50","end":"12:24","startHours":10.830521173351066,"endHours":12.397327051648837,"quality":"inauspicious"},{"name":"Chala","start":"12:24","end":"13:58","startHours":12.397327051648837,"endHours":13.964132929946604,"quality":"neutral"},{"name":"Labha","start":"13:58","end":"15:32","startHours":13.964132929946604,"endHours":15.530938808244372,"quality":"auspicious"},{"name":"Amṛta","start":"15:32","end":"17:06","startHours":15.530938808244372,"endHours":17.097744686542143,"quality":"auspicious"},{"name":"Kāla","start":"17:06","end":"18:40","startHours":17.097744686542143,"endHours":18.66455056483991,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:40","end":"20:06","startHours":18.66455056483991,"endHours":20.097744686542143,"quality":"auspicious"},{"name":"Amṛta","start":"20:06","end":"21:32","startHours":20.097744686542143,"endHours":21.530938808244372,"quality":"auspicious"},{"name":"Kāla","start":"21:32","end":"22:58","startHours":21.530938808244372,"endHours":22.964132929946604,"quality":"inauspicious"},{"name":"Śubha","start":"22:58","end":"00:24","startHours":22.964132929946604,"endHours":24.397327051648837,"quality":"auspicious"},{"name":"Roga","start":"00:24","end":"01:50","startHours":24.397327051648837,"endHours":25.830521173351066,"quality":"inauspicious"},{"name":"Udveg","start":"01:50","end":"03:16","startHours":25.830521173351066,"endHours":27.2637152950533,"quality":"inauspicious"},{"name":"Chala","start":"03:16","end":"04:42","startHours":27.2637152950533,"endHours":28.69690941675553,"quality":"neutral"},{"name":"Labha","start":"04:42","end":"06:08","startHours":28.69690941675553,"endHours":30.13010353845776,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:08","end":"07:08","startHours":6.130103538457761,"endHours":7.130103538457761,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:08","end":"08:08","startHours":7.130103538457761,"endHours":8.13010353845776,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:08","end":"09:08","startHours":8.13010353845776,"endHours":9.13010353845776,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:08","end":"10:08","startHours":9.13010353845776,"endHours":10.13010353845776,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:08","end":"11:08","startHours":10.13010353845776,"endHours":11.13010353845776,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:08","end":"12:08","startHours":11.13010353845776,"endHours":12.13010353845776,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:08","end":"13:08","startHours":12.13010353845776,"endHours":13.13010353845776,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:08","end":"14:08","startHours":13.13010353845776,"endHours":14.13010353845776,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:08","end":"15:08","startHours":14.13010353845776,"endHours":15.13010353845776,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:08","end":"16:08","startHours":15.13010353845776,"endHours":16.13010353845776,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:08","end":"17:08","startHours":16.13010353845776,"endHours":17.13010353845776,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:08","end":"18:08","startHours":17.13010353845776,"endHours":18.13010353845776,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:08","end":"19:08","startHours":18.13010353845776,"endHours":19.13010353845776,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:08","end":"20:08","startHours":19.13010353845776,"endHours":20.13010353845776,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:08","end":"21:08","startHours":20.13010353845776,"endHours":21.13010353845776,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:08","end":"22:08","startHours":21.13010353845776,"endHours":22.13010353845776,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:08","end":"23:08","startHours":22.13010353845776,"endHours":23.13010353845776,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:08","end":"00:08","startHours":23.13010353845776,"endHours":24.13010353845776,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:08","end":"01:08","startHours":24.13010353845776,"endHours":25.13010353845776,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:08","end":"02:08","startHours":25.13010353845776,"endHours":26.13010353845776,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:08","end":"03:08","startHours":26.13010353845776,"endHours":27.13010353845776,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:08","end":"04:08","startHours":27.13010353845776,"endHours":28.13010353845776,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:08","end":"05:08","startHours":28.13010353845776,"endHours":29.13010353845776,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:08","end":"06:08","startHours":29.13010353845776,"endHours":30.13010353845776,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-West","rahuVasa":"East","anandadiYoga":{"name":"Mausala","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":5.595653504273429,"eotMinutes":-3.4036230989301703,"ayanamsa":23.5912}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Phālguna","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Kṛṣṇa Amāvasyā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Kṛṣṇa Amāvasyā","url":"/day/-3137-10-20","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"noida"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 4, 1981 CE · Noida, Uttar Pradesh · Vidhyamitra","description":"April 4, 1981 CE for Noida, Uttar Pradesh: Kṛṣṇa Amāvasyā, sūryodaya 06:08, sūryāsta 18:40.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/noida/1981-04-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/noida/1981-04-04","sa":"https://sa.vidhyamitra.com/city/noida/1981-04-04","hi":"https://hi.vidhyamitra.com/city/noida/1981-04-04","x-default":"https://vidhyamitra.com/city/noida/1981-04-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T09:07:37.628Z","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":"2026-05-31T09:07:37.628Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T09:07:37.628Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}