{"id":"vidhyamitra:city-day:howrah:1981-02-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/howrah/1981-02-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-21","date_display":"February 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":2,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444656.770833,"kali_year":5082,"ahargana":1856191.2708,"sun":{"sidereal_longitude":308.9092,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":155.3976,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":206.4884,"elapsed_within_tithi_degrees":2.4884},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":155.3976,"elapsed_within_degrees":8.731},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":104.3068},"karana":{"half_tithi_index":34,"name":"Vaṇija"},"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":2,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444656.770833,"ahargana":1856191.2708,"kali_year":5082,"ayanamsa_lahiri":23.5896,"grahas":{"sun":{"sidereal_longitude":308.738391,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":152.69559100000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":false,"latitude":3.1994},"mars":{"sidereal_longitude":317.828491,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":301.4962909999999,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":true},"jupiter":{"sidereal_longitude":165.709791,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":297.70509100000004,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":165.02309100000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.0539,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.0539,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":2,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444656.770833,"kali_year":5082,"ahargana":1856191.2708,"sun":{"sidereal_longitude":308.9092,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":155.3976,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":206.4884,"elapsed_within_tithi_degrees":2.4884},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3,"moon_longitude":155.3976,"elapsed_within_degrees":8.731},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":104.3068},"karana":{"half_tithi_index":34,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.199,"elongation":153.512},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.199,"opposition_distance":26.488}},"eclipse_window_40days":[{"offset_days":-16,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"city":{"slug":"howrah","name":"Howrah, West Bengal","lat":22.5958,"lon":88.2636,"tz_offset_hours":5.5,"state":"West Bengal","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"howrah","name":"Howrah, West Bengal","lat":22.5958,"lon":88.2636,"tz_offset_hours":5.5,"state":"West Bengal","country":"IN","tier":"tier-1"},"sunriseLocal":"06:05","sunsetLocal":"17:37","solarNoonLocal":"11:51","dayLengthHours":11.524557384496397,"dayLengthDisplay":"11 Hours 31 Mins 28 Secs","nightLengthDisplay":"12 Hours 28 Mins 32 Secs","moonriseLocal":"19:22","moonsetLocal":"07:32","rahuKala":{"name":"Rāhu Kāla","start":"08:58","end":"10:25","startHours":8.971118026229838,"endHours":10.411687699291889,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:18","end":"14:44","startHours":13.292827045415988,"endHours":14.733396718478037,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:05","end":"07:32","startHours":6.08997868010574,"endHours":7.53054835316779,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:47","end":"09:10","startHours":8.779042069821566,"endHours":9.163193982638113,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:34","end":"06:53","startHours":6.570168571126423,"endHours":6.87749010137966,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:28","end":"12:14","startHours":11.468105459537393,"endHours":12.236409285170486,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:33","end":"05:19","startHours":4.553371028839553,"endHours":5.321674854472647,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:08","end":"06:05","startHours":5.129598898064374,"endHours":6.08997868010574,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:46","end":"14:32","startHours":13.773016936436672,"endHours":14.541320762069766,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:25","end":"17:49","startHours":17.41453606460214,"endHours":17.814536064602137,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:37","end":"18:06","startHours":17.614536064602138,"endHours":18.09472595562282,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:22","end":"19:07","startHours":17.364536064602138,"endHours":19.114536064602138,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:28","end":"00:14","startHours":23.468105459537394,"endHours":24.236409285170485,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:05","end":"07:32","startHours":6.08997868010574,"endHours":7.53054835316779,"quality":"inauspicious"},{"name":"Śubha","start":"07:32","end":"08:58","startHours":7.53054835316779,"endHours":8.971118026229838,"quality":"auspicious"},{"name":"Roga","start":"08:58","end":"10:25","startHours":8.971118026229838,"endHours":10.411687699291889,"quality":"inauspicious"},{"name":"Udveg","start":"10:25","end":"11:51","startHours":10.411687699291889,"endHours":11.85225737235394,"quality":"inauspicious"},{"name":"Chala","start":"11:51","end":"13:18","startHours":11.85225737235394,"endHours":13.292827045415988,"quality":"neutral"},{"name":"Labha","start":"13:18","end":"14:44","startHours":13.292827045415988,"endHours":14.733396718478037,"quality":"auspicious"},{"name":"Amṛta","start":"14:44","end":"16:10","startHours":14.733396718478037,"endHours":16.173966391540088,"quality":"auspicious"},{"name":"Kāla","start":"16:10","end":"17:37","startHours":16.173966391540088,"endHours":17.614536064602138,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:37","end":"19:10","startHours":17.614536064602138,"endHours":19.173966391540088,"quality":"auspicious"},{"name":"Amṛta","start":"19:10","end":"20:44","startHours":19.173966391540088,"endHours":20.73339671847804,"quality":"auspicious"},{"name":"Kāla","start":"20:44","end":"22:18","startHours":20.73339671847804,"endHours":22.29282704541599,"quality":"inauspicious"},{"name":"Śubha","start":"22:18","end":"23:51","startHours":22.29282704541599,"endHours":23.85225737235394,"quality":"auspicious"},{"name":"Roga","start":"23:51","end":"01:25","startHours":23.85225737235394,"endHours":25.41168769929189,"quality":"inauspicious"},{"name":"Udveg","start":"01:25","end":"02:58","startHours":25.41168769929189,"endHours":26.97111802622984,"quality":"inauspicious"},{"name":"Chala","start":"02:58","end":"04:32","startHours":26.97111802622984,"endHours":28.53054835316779,"quality":"neutral"},{"name":"Labha","start":"04:32","end":"06:05","startHours":28.53054835316779,"endHours":30.08997868010574,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:05","end":"07:05","startHours":6.08997868010574,"endHours":7.08997868010574,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:05","end":"08:05","startHours":7.08997868010574,"endHours":8.089978680105741,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:05","end":"09:05","startHours":8.089978680105741,"endHours":9.089978680105741,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:05","end":"10:05","startHours":9.089978680105741,"endHours":10.089978680105741,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:05","end":"11:05","startHours":10.089978680105741,"endHours":11.089978680105741,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:05","end":"12:05","startHours":11.089978680105741,"endHours":12.089978680105741,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:05","end":"13:05","startHours":12.089978680105741,"endHours":13.089978680105741,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:05","end":"14:05","startHours":13.089978680105741,"endHours":14.089978680105741,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:05","end":"15:05","startHours":14.089978680105741,"endHours":15.089978680105741,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:05","end":"16:05","startHours":15.089978680105741,"endHours":16.08997868010574,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:05","end":"17:05","startHours":16.08997868010574,"endHours":17.08997868010574,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:05","end":"18:05","startHours":17.08997868010574,"endHours":18.08997868010574,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:05","end":"19:05","startHours":18.08997868010574,"endHours":19.08997868010574,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:05","end":"20:05","startHours":19.08997868010574,"endHours":20.08997868010574,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:05","end":"21:05","startHours":20.08997868010574,"endHours":21.08997868010574,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:05","end":"22:05","startHours":21.08997868010574,"endHours":22.08997868010574,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:05","end":"23:05","startHours":22.08997868010574,"endHours":23.08997868010574,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:05","end":"00:05","startHours":23.08997868010574,"endHours":24.08997868010574,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:05","end":"01:05","startHours":24.08997868010574,"endHours":25.08997868010574,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:05","end":"02:05","startHours":25.08997868010574,"endHours":26.08997868010574,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:05","end":"03:05","startHours":26.08997868010574,"endHours":27.08997868010574,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:05","end":"04:05","startHours":27.08997868010574,"endHours":28.08997868010574,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:05","end":"05:05","startHours":28.08997868010574,"endHours":29.08997868010574,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:05","end":"06:05","startHours":29.08997868010574,"endHours":30.08997868010574,"planetary_lord":"Mercury"}],"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","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-West","rahuVasa":"East","anandadiYoga":{"name":"Śrīvatsa","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":-10.644266708908873,"eotMinutes":-14.189842341236304,"ayanamsa":23.5896}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"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 Tṛtīyā · 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":[]},"validity":{"eternal":false,"location_specific":"howrah"},"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, 1981 CE · Howrah, West Bengal · Vidhyamitra","description":"February 21, 1981 CE for Howrah, West Bengal: Kṛṣṇa Tṛtīyā, sūryodaya 06:05, sūryāsta 17:37.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/howrah/1981-02-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/howrah/1981-02-21","sa":"https://sa.vidhyamitra.com/city/howrah/1981-02-21","hi":"https://hi.vidhyamitra.com/city/howrah/1981-02-21","x-default":"https://vidhyamitra.com/city/howrah/1981-02-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T20:54:30.502Z","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":"2026-06-01T20:54:30.502Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T20:54:30.502Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}