{"id":"vidhyamitra:city-day:varanasi:1981-02-11:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/varanasi/1981-02-11","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-02-11","date_display":"February 11, 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":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444646.770833,"kali_year":5082,"ahargana":1856181.2708,"sun":{"sidereal_longitude":298.7666,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":18.0954,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":79.3288,"elapsed_within_tithi_degrees":7.3288},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2,"moon_longitude":18.0954,"elapsed_within_degrees":4.762},"yoga":{"number":24,"name":"Śukla","sum_longitude":316.8619},"karana":{"half_tithi_index":13,"name":"Vaṇija"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"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":11,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444646.770833,"ahargana":1856181.2708,"kali_year":5082,"ayanamsa_lahiri":23.5892,"grahas":{"sun":{"sidereal_longitude":298.64307299999996,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":19.364472999999975,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false,"latitude":-4.4957},"mars":{"sidereal_longitude":309.941373,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":311.081373,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":166.387873,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"venus":{"sidereal_longitude":285.1930729999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":165.494373,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":110.5837,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":290.5837,"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":11,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444646.770833,"kali_year":5082,"ahargana":1856181.2708,"sun":{"sidereal_longitude":298.7666,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":18.0954,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":79.3288,"elapsed_within_tithi_degrees":7.3288},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2,"moon_longitude":18.0954,"elapsed_within_degrees":4.762},"yoga":{"number":24,"name":"Śukla","sum_longitude":316.8619},"karana":{"half_tithi_index":13,"name":"Vaṇija"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.496,"elongation":79.329},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.496,"opposition_distance":100.671}},"eclipse_window_40days":[{"offset_days":-6,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"city":{"slug":"varanasi","name":"Vārāṇasī (Kāśī)","lat":25.3176,"lon":82.9739,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"varanasi","name":"Vārāṇasī (Kāśī)","lat":25.3176,"lon":82.9739,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"06:36","sunsetLocal":"17:49","solarNoonLocal":"12:13","dayLengthHours":11.217609776099314,"dayLengthDisplay":"11 Hours 13 Mins 03 Secs","nightLengthDisplay":"12 Hours 46 Mins 57 Secs","moonriseLocal":"11:02","moonsetLocal":"00:09","rahuKala":{"name":"Rāhu Kāla","start":"12:13","end":"13:37","startHours":12.211359025842977,"endHours":13.613560247855393,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:00","end":"09:24","startHours":8.004755359805735,"endHours":9.40695658181815,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:49","end":"12:13","startHours":10.809157803830564,"endHours":12.211359025842977,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:13","end":"09:36","startHours":9.219996418883161,"endHours":9.593916744753137,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:04","end":"07:22","startHours":7.069954545130793,"endHours":7.369090805826775,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:35","startHours":11.837438699973003,"endHours":12.585279351712956,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:06","end":"05:51","startHours":5.106872834313412,"endHours":5.854713486053367,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:40","end":"06:36","startHours":5.6677533231183785,"endHours":6.602554137793321,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:05","end":"14:50","startHours":14.080960655192865,"endHours":14.828801306932819,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:37","end":"18:01","startHours":17.620163913892636,"endHours":18.020163913892635,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:49","end":"18:17","startHours":17.820163913892635,"endHours":18.287564321230107,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:34","end":"19:19","startHours":17.570163913892635,"endHours":19.320163913892635,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:35","startHours":23.837438699973003,"endHours":24.58527935171296,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:36","end":"08:00","startHours":6.602554137793321,"endHours":8.004755359805735,"quality":"auspicious"},{"name":"Amṛta","start":"08:00","end":"09:24","startHours":8.004755359805735,"endHours":9.40695658181815,"quality":"auspicious"},{"name":"Kāla","start":"09:24","end":"10:49","startHours":9.40695658181815,"endHours":10.809157803830564,"quality":"inauspicious"},{"name":"Śubha","start":"10:49","end":"12:13","startHours":10.809157803830564,"endHours":12.211359025842977,"quality":"auspicious"},{"name":"Roga","start":"12:13","end":"13:37","startHours":12.211359025842977,"endHours":13.613560247855393,"quality":"inauspicious"},{"name":"Udveg","start":"13:37","end":"15:01","startHours":13.613560247855393,"endHours":15.015761469867806,"quality":"inauspicious"},{"name":"Chala","start":"15:01","end":"16:25","startHours":15.015761469867806,"endHours":16.41796269188022,"quality":"neutral"},{"name":"Labha","start":"16:25","end":"17:49","startHours":16.41796269188022,"endHours":17.820163913892635,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"17:49","end":"19:25","startHours":17.820163913892635,"endHours":19.41796269188022,"quality":"inauspicious"},{"name":"Chala","start":"19:25","end":"21:01","startHours":19.41796269188022,"endHours":21.015761469867808,"quality":"neutral"},{"name":"Labha","start":"21:01","end":"22:37","startHours":21.015761469867808,"endHours":22.613560247855393,"quality":"auspicious"},{"name":"Amṛta","start":"22:37","end":"00:13","startHours":22.613560247855393,"endHours":24.211359025842977,"quality":"auspicious"},{"name":"Kāla","start":"00:13","end":"01:49","startHours":24.211359025842977,"endHours":25.809157803830566,"quality":"inauspicious"},{"name":"Śubha","start":"01:49","end":"03:24","startHours":25.809157803830566,"endHours":27.40695658181815,"quality":"auspicious"},{"name":"Roga","start":"03:24","end":"05:00","startHours":27.40695658181815,"endHours":29.004755359805735,"quality":"inauspicious"},{"name":"Udveg","start":"05:00","end":"06:36","startHours":29.004755359805735,"endHours":30.60255413779332,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:36","end":"07:36","startHours":6.602554137793321,"endHours":7.602554137793321,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:36","end":"08:36","startHours":7.602554137793321,"endHours":8.602554137793321,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:36","end":"09:36","startHours":8.602554137793321,"endHours":9.602554137793321,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:36","end":"10:36","startHours":9.602554137793321,"endHours":10.602554137793321,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:36","end":"11:36","startHours":10.602554137793321,"endHours":11.602554137793321,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:36","end":"12:36","startHours":11.602554137793321,"endHours":12.602554137793321,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:36","end":"13:36","startHours":12.602554137793321,"endHours":13.602554137793321,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:36","end":"14:36","startHours":13.602554137793321,"endHours":14.602554137793321,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:36","end":"15:36","startHours":14.602554137793321,"endHours":15.602554137793321,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:36","end":"16:36","startHours":15.602554137793321,"endHours":16.60255413779332,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:36","end":"17:36","startHours":16.60255413779332,"endHours":17.60255413779332,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:36","end":"18:36","startHours":17.60255413779332,"endHours":18.60255413779332,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:36","end":"19:36","startHours":18.60255413779332,"endHours":19.60255413779332,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:36","end":"20:36","startHours":19.60255413779332,"endHours":20.60255413779332,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:36","end":"21:36","startHours":20.60255413779332,"endHours":21.60255413779332,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:36","end":"22:36","startHours":21.60255413779332,"endHours":22.60255413779332,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:36","end":"23:36","startHours":22.60255413779332,"endHours":23.60255413779332,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:36","end":"00:36","startHours":23.60255413779332,"endHours":24.60255413779332,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:36","end":"01:36","startHours":24.60255413779332,"endHours":25.60255413779332,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:36","end":"02:36","startHours":25.60255413779332,"endHours":26.60255413779332,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:36","end":"03:36","startHours":26.60255413779332,"endHours":27.60255413779332,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:36","end":"04:36","startHours":27.60255413779332,"endHours":28.60255413779332,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:36","end":"05:36","startHours":28.60255413779332,"endHours":29.60255413779332,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:36","end":"06:36","startHours":29.60255413779332,"endHours":30.60255413779332,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"East","rahuVasa":"South-West","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-14.098875286053813,"eotMinutes":-14.577141550578775,"ayanamsa":23.5892}},"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","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Saptamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2}],"todays_walk":{"walk":{"id":"budha-walk","name":"Budha Walk","name_sanskrit":"बुध यात्रा","type":"graha","description":"Discrimination + BG 2.41 (vyavasāyātmikā buddhi).","step_count":6,"url":"/walk/budha-walk"},"reason":"Budhavāra (Wednesday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"varanasi"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 11, 1981 CE · Vārāṇasī (Kāśī) · Vidhyamitra","description":"February 11, 1981 CE for Vārāṇasī (Kāśī): Śukla Saptamī, sūryodaya 06:36, sūryāsta 17:49.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/varanasi/1981-02-11","hreflang_alternates":{"en":"https://vidhyamitra.com/city/varanasi/1981-02-11","sa":"https://sa.vidhyamitra.com/city/varanasi/1981-02-11","hi":"https://hi.vidhyamitra.com/city/varanasi/1981-02-11","x-default":"https://vidhyamitra.com/city/varanasi/1981-02-11"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T15:43:54.850Z","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":"2026-05-14T15:43:54.850Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T15:43:54.850Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}