{"id":"vidhyamitra:city-day:shimla:1981-02-06:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/shimla/1981-02-06","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-06","date_display":"February 6, 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":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444641.770833,"kali_year":5082,"ahargana":1856176.2708,"sun":{"sidereal_longitude":293.6755,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":306.5812,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":12.9057,"elapsed_within_tithi_degrees":0.9057},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4,"moon_longitude":306.5812,"elapsed_within_degrees":13.2479},"yoga":{"number":19,"name":"Parigha","sum_longitude":240.2567},"karana":{"half_tithi_index":2,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":6,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444641.770833,"ahargana":1856176.2708,"kali_year":5082,"ayanamsa_lahiri":23.589,"grahas":{"sun":{"sidereal_longitude":293.580464,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":307.932764,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false,"latitude":-1.219},"mars":{"sidereal_longitude":305.99146399999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":311.09426400000007,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":166.61786400000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":278.93306400000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":165.67296399999998,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.8486,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.8486,"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":6,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444641.770833,"kali_year":5082,"ahargana":1856176.2708,"sun":{"sidereal_longitude":293.6755,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":306.5812,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":12.9057,"elapsed_within_tithi_degrees":0.9057},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4,"moon_longitude":306.5812,"elapsed_within_degrees":13.2479},"yoga":{"number":19,"name":"Parigha","sum_longitude":240.2567},"karana":{"half_tithi_index":2,"name":"Bālava"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.219,"elongation":12.906},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.219,"opposition_distance":167.094}},"eclipse_window_40days":[{"offset_days":-17,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776},{"offset_days":-1,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"city":{"slug":"shimla","name":"Shimla, Himachal Pradesh","lat":31.1048,"lon":77.1734,"tz_offset_hours":5.5,"state":"Himachal Pradesh","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"shimla","name":"Shimla, Himachal Pradesh","lat":31.1048,"lon":77.1734,"tz_offset_hours":5.5,"state":"Himachal Pradesh","country":"IN","tier":"tier-1"},"sunriseLocal":"07:11","sunsetLocal":"18:01","solarNoonLocal":"12:36","dayLengthHours":10.835699861247555,"dayLengthDisplay":"10 Hours 50 Mins 09 Secs","nightLengthDisplay":"13 Hours 09 Mins 51 Secs","moonriseLocal":"07:57","moonsetLocal":"19:09","rahuKala":{"name":"Rāhu Kāla","start":"11:14","end":"12:36","startHours":11.238899735968674,"endHours":12.59336221862462,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:18","end":"16:39","startHours":15.302287183936507,"endHours":16.656749666592454,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:32","end":"09:53","startHours":8.529974770656786,"endHours":9.88443725331273,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:42","end":"10:04","startHours":9.703842255625272,"endHours":10.06503225100019,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:38","end":"07:55","startHours":7.62699978221949,"endHours":7.915951778519425,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:14","end":"12:57","startHours":12.232172223249702,"endHours":12.954552213999538,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:44","end":"06:27","startHours":5.730752306501167,"endHours":6.453132297251004,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:16","end":"07:11","startHours":6.272537299563545,"endHours":7.175512288000841,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:24","end":"15:07","startHours":14.399312195499212,"endHours":15.12169218624905,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:49","end":"18:13","startHours":17.811212149248398,"endHours":18.211212149248396,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:01","end":"18:28","startHours":18.011212149248397,"endHours":18.462699643467044,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:46","end":"19:31","startHours":17.761212149248397,"endHours":19.511212149248397,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:14","end":"00:57","startHours":24.2321722232497,"endHours":24.954552213999538,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:11","end":"08:32","startHours":7.175512288000841,"endHours":8.529974770656786,"quality":"neutral"},{"name":"Labha","start":"08:32","end":"09:53","startHours":8.529974770656786,"endHours":9.88443725331273,"quality":"auspicious"},{"name":"Amṛta","start":"09:53","end":"11:14","startHours":9.88443725331273,"endHours":11.238899735968674,"quality":"auspicious"},{"name":"Kāla","start":"11:14","end":"12:36","startHours":11.238899735968674,"endHours":12.59336221862462,"quality":"inauspicious"},{"name":"Śubha","start":"12:36","end":"13:57","startHours":12.59336221862462,"endHours":13.947824701280563,"quality":"auspicious"},{"name":"Roga","start":"13:57","end":"15:18","startHours":13.947824701280563,"endHours":15.302287183936507,"quality":"inauspicious"},{"name":"Udveg","start":"15:18","end":"16:39","startHours":15.302287183936507,"endHours":16.656749666592454,"quality":"inauspicious"},{"name":"Chala","start":"16:39","end":"18:01","startHours":16.656749666592454,"endHours":18.011212149248397,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"18:01","end":"19:39","startHours":18.011212149248397,"endHours":19.656749666592454,"quality":"inauspicious"},{"name":"Udveg","start":"19:39","end":"21:18","startHours":19.656749666592454,"endHours":21.302287183936507,"quality":"inauspicious"},{"name":"Chala","start":"21:18","end":"22:57","startHours":21.302287183936507,"endHours":22.947824701280563,"quality":"neutral"},{"name":"Labha","start":"22:57","end":"00:36","startHours":22.947824701280563,"endHours":24.59336221862462,"quality":"auspicious"},{"name":"Amṛta","start":"00:36","end":"02:14","startHours":24.59336221862462,"endHours":26.238899735968676,"quality":"auspicious"},{"name":"Kāla","start":"02:14","end":"03:53","startHours":26.238899735968676,"endHours":27.884437253312733,"quality":"inauspicious"},{"name":"Śubha","start":"03:53","end":"05:32","startHours":27.884437253312733,"endHours":29.529974770656786,"quality":"auspicious"},{"name":"Roga","start":"05:32","end":"07:11","startHours":29.529974770656786,"endHours":31.175512288000842,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:11","end":"08:11","startHours":7.175512288000841,"endHours":8.175512288000842,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:11","end":"09:11","startHours":8.175512288000842,"endHours":9.175512288000842,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:11","end":"10:11","startHours":9.175512288000842,"endHours":10.175512288000842,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:11","end":"11:11","startHours":10.175512288000842,"endHours":11.175512288000842,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:11","end":"12:11","startHours":11.175512288000842,"endHours":12.175512288000842,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:11","end":"13:11","startHours":12.175512288000842,"endHours":13.175512288000842,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:11","end":"14:11","startHours":13.175512288000842,"endHours":14.175512288000842,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:11","end":"15:11","startHours":14.175512288000842,"endHours":15.175512288000842,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:11","end":"16:11","startHours":15.175512288000842,"endHours":16.175512288000842,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:11","end":"17:11","startHours":16.175512288000842,"endHours":17.175512288000842,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:11","end":"18:11","startHours":17.175512288000842,"endHours":18.175512288000842,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:11","end":"19:11","startHours":18.175512288000842,"endHours":19.175512288000842,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:11","end":"20:11","startHours":19.175512288000842,"endHours":20.175512288000842,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:11","end":"21:11","startHours":20.175512288000842,"endHours":21.175512288000842,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:11","end":"22:11","startHours":21.175512288000842,"endHours":22.175512288000842,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:11","end":"23:11","startHours":22.175512288000842,"endHours":23.175512288000842,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:11","end":"00:11","startHours":23.175512288000842,"endHours":24.175512288000842,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:11","end":"01:11","startHours":24.175512288000842,"endHours":25.175512288000842,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:11","end":"02:11","startHours":25.175512288000842,"endHours":26.175512288000842,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:11","end":"03:11","startHours":26.175512288000842,"endHours":27.175512288000842,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:11","end":"04:11","startHours":27.175512288000842,"endHours":28.175512288000842,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:11","end":"05:11","startHours":28.175512288000842,"endHours":29.175512288000842,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:11","end":"06:11","startHours":29.175512288000842,"endHours":30.175512288000842,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:11","end":"07:11","startHours":30.175512288000842,"endHours":31.175512288000842,"planetary_lord":"Mars"}],"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":["Meṣa","Karka","Siṃha","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"South-East","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-15.68755605604244,"eotMinutes":-14.295333117477217,"ayanamsa":23.589}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Māgha","lunar_month_amanta":"Māgha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Dvitīyā · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"shimla"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 6, 1981 CE · Shimla, Himachal Pradesh · Vidhyamitra","description":"February 6, 1981 CE for Shimla, Himachal Pradesh: Śukla Dvitīyā, sūryodaya 07:11, sūryāsta 18:01.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/shimla/1981-02-06","hreflang_alternates":{"en":"https://vidhyamitra.com/city/shimla/1981-02-06","sa":"https://sa.vidhyamitra.com/city/shimla/1981-02-06","hi":"https://hi.vidhyamitra.com/city/shimla/1981-02-06","x-default":"https://vidhyamitra.com/city/shimla/1981-02-06"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T10:46:58.010Z","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":"2026-06-02T10:46:58.010Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T10:46:58.010Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}