{"id":"vidhyamitra:city-day:noida:1981-02-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/noida/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":"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":"06:54","sunsetLocal":"18:15","solarNoonLocal":"12:35","dayLengthHours":11.34711553101425,"dayLengthDisplay":"11 Hours 20 Mins 50 Secs","nightLengthDisplay":"12 Hours 39 Mins 10 Secs","moonriseLocal":"20:05","moonsetLocal":"08:16","rahuKala":{"name":"Rāhu Kāla","start":"09:44","end":"11:10","startHours":9.740318489600375,"endHours":11.158707930977155,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:00","end":"15:25","startHours":13.995486813730718,"endHours":15.4138762551075,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:54","end":"08:19","startHours":6.903539606846812,"endHours":8.321929048223593,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:33","end":"09:56","startHours":9.551199897416804,"endHours":9.929437081783945,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:23","end":"07:41","startHours":7.37633608730574,"endHours":7.678925834799453,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:12","end":"12:57","startHours":12.198860187986796,"endHours":12.95533455672108,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:23","end":"06:09","startHours":5.390590869378245,"endHours":6.147065238112529,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:57","end":"06:54","startHours":5.957946645928958,"endHours":6.903539606846812,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:28","end":"15:13","startHours":14.468283294189646,"endHours":15.22475766292393,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:03","end":"18:27","startHours":18.050655137861064,"endHours":18.450655137861062,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:15","end":"18:43","startHours":18.250655137861063,"endHours":18.72345161831999,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:00","end":"19:45","startHours":18.000655137861063,"endHours":19.750655137861063,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:12","end":"00:57","startHours":24.1988601879868,"endHours":24.95533455672108,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:54","end":"08:19","startHours":6.903539606846812,"endHours":8.321929048223593,"quality":"inauspicious"},{"name":"Śubha","start":"08:19","end":"09:44","startHours":8.321929048223593,"endHours":9.740318489600375,"quality":"auspicious"},{"name":"Roga","start":"09:44","end":"11:10","startHours":9.740318489600375,"endHours":11.158707930977155,"quality":"inauspicious"},{"name":"Udveg","start":"11:10","end":"12:35","startHours":11.158707930977155,"endHours":12.577097372353936,"quality":"inauspicious"},{"name":"Chala","start":"12:35","end":"14:00","startHours":12.577097372353936,"endHours":13.995486813730718,"quality":"neutral"},{"name":"Labha","start":"14:00","end":"15:25","startHours":13.995486813730718,"endHours":15.4138762551075,"quality":"auspicious"},{"name":"Amṛta","start":"15:25","end":"16:50","startHours":15.4138762551075,"endHours":16.83226569648428,"quality":"auspicious"},{"name":"Kāla","start":"16:50","end":"18:15","startHours":16.83226569648428,"endHours":18.250655137861063,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:15","end":"19:50","startHours":18.250655137861063,"endHours":19.83226569648428,"quality":"auspicious"},{"name":"Amṛta","start":"19:50","end":"21:25","startHours":19.83226569648428,"endHours":21.4138762551075,"quality":"auspicious"},{"name":"Kāla","start":"21:25","end":"23:00","startHours":21.4138762551075,"endHours":22.99548681373072,"quality":"inauspicious"},{"name":"Śubha","start":"23:00","end":"00:35","startHours":22.99548681373072,"endHours":24.57709737235394,"quality":"auspicious"},{"name":"Roga","start":"00:35","end":"02:10","startHours":24.57709737235394,"endHours":26.158707930977158,"quality":"inauspicious"},{"name":"Udveg","start":"02:10","end":"03:44","startHours":26.158707930977158,"endHours":27.740318489600376,"quality":"inauspicious"},{"name":"Chala","start":"03:44","end":"05:19","startHours":27.740318489600376,"endHours":29.321929048223595,"quality":"neutral"},{"name":"Labha","start":"05:19","end":"06:54","startHours":29.321929048223595,"endHours":30.903539606846813,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:54","end":"07:54","startHours":6.903539606846812,"endHours":7.903539606846812,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:54","end":"08:54","startHours":7.903539606846812,"endHours":8.903539606846813,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:54","end":"09:54","startHours":8.903539606846813,"endHours":9.903539606846813,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:54","end":"10:54","startHours":9.903539606846813,"endHours":10.903539606846813,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:54","end":"11:54","startHours":10.903539606846813,"endHours":11.903539606846813,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:54","end":"12:54","startHours":11.903539606846813,"endHours":12.903539606846813,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:54","end":"13:54","startHours":12.903539606846813,"endHours":13.903539606846813,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:54","end":"14:54","startHours":13.903539606846813,"endHours":14.903539606846813,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:54","end":"15:54","startHours":14.903539606846813,"endHours":15.903539606846813,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:54","end":"16:54","startHours":15.903539606846813,"endHours":16.903539606846813,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:54","end":"17:54","startHours":16.903539606846813,"endHours":17.903539606846813,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:54","end":"18:54","startHours":17.903539606846813,"endHours":18.903539606846813,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:54","end":"19:54","startHours":18.903539606846813,"endHours":19.903539606846813,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:54","end":"20:54","startHours":19.903539606846813,"endHours":20.903539606846813,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:54","end":"21:54","startHours":20.903539606846813,"endHours":21.903539606846813,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:54","end":"22:54","startHours":21.903539606846813,"endHours":22.903539606846813,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:54","end":"23:54","startHours":22.903539606846813,"endHours":23.903539606846813,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:54","end":"00:54","startHours":23.903539606846813,"endHours":24.903539606846813,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:54","end":"01:54","startHours":24.903539606846813,"endHours":25.903539606846813,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:54","end":"02:54","startHours":25.903539606846813,"endHours":26.903539606846813,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:54","end":"03:54","startHours":26.903539606846813,"endHours":27.903539606846813,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:54","end":"04:54","startHours":27.903539606846813,"endHours":28.903539606846813,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:54","end":"05:54","startHours":28.903539606846813,"endHours":29.903539606846813,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:54","end":"06:54","startHours":29.903539606846813,"endHours":30.903539606846813,"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":"noida"},"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 · Noida, Uttar Pradesh · Vidhyamitra","description":"February 21, 1981 CE for Noida, Uttar Pradesh: Kṛṣṇa Tṛtīyā, sūryodaya 06:54, sūryāsta 18:15.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/noida/1981-02-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/noida/1981-02-21","sa":"https://sa.vidhyamitra.com/city/noida/1981-02-21","hi":"https://hi.vidhyamitra.com/city/noida/1981-02-21","x-default":"https://vidhyamitra.com/city/noida/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":"2026-06-02T11:23:51.263Z","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":"2026-06-02T11:23:51.263Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T11:23:51.263Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}