{"id":"vidhyamitra:city-day:erode:1997-12-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1997-12-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1997-12-20","date_display":"December 20, 1997 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":1997,"month":12,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450802.770833,"kali_year":5099,"ahargana":1862337.2708,"sun":{"sidereal_longitude":244.0258,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":134.9476,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":21,"name":"Ṣaṣṭhī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ṣaṣṭhī","elongation_degrees":250.9219,"elapsed_within_tithi_degrees":10.9219},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1,"moon_longitude":134.9476,"elapsed_within_degrees":1.6143},"yoga":{"number":2,"name":"Prīti","sum_longitude":18.9734},"karana":{"half_tithi_index":41,"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":1997,"month":12,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2450802.770833,"ahargana":1862337.2708,"kali_year":5099,"ayanamsa_lahiri":23.8246,"grahas":{"sun":{"sidereal_longitude":244.36186899999996,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"moon":{"sidereal_longitude":134.23336900000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false,"latitude":-0.739},"mars":{"sidereal_longitude":277.574169,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":237.96416899999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":296.02416900000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":279.23456899999996,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":true},"saturn":{"sidereal_longitude":349.683069,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":144.4092,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":324.4092,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"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":1997,"month":12,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2450802.770833,"kali_year":5099,"ahargana":1862337.2708,"sun":{"sidereal_longitude":244.0258,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":134.9476,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":21,"name":"Ṣaṣṭhī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Ṣaṣṭhī","elongation_degrees":250.9219,"elapsed_within_tithi_degrees":10.9219},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1,"moon_longitude":134.9476,"elapsed_within_degrees":1.6143},"yoga":{"number":2,"name":"Prīti","sum_longitude":18.9734},"karana":{"half_tithi_index":41,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.739,"elongation":109.078},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.739,"opposition_distance":70.922}},"eclipse_window_40days":[]},"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"erode","name":"Erode, Tamil Nadu","lat":11.341,"lon":77.7172,"tz_offset_hours":5.5,"state":"Tamil Nadu","country":"IN","tier":"tier-1"},"sunriseLocal":"06:34","sunsetLocal":"18:01","solarNoonLocal":"12:17","dayLengthHours":11.459192151156635,"dayLengthDisplay":"11 Hours 27 Mins 33 Secs","nightLengthDisplay":"12 Hours 32 Mins 27 Secs","moonriseLocal":"22:47","moonsetLocal":"11:06","rahuKala":{"name":"Rāhu Kāla","start":"09:25","end":"10:51","startHours":9.42319000350303,"endHours":10.85558902239761,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:43","end":"15:09","startHours":13.720387060186768,"endHours":15.152786079081348,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:34","end":"07:59","startHours":6.558391965713871,"endHours":7.99079098460845,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:14","end":"09:37","startHours":9.232203467650418,"endHours":9.61417653935564,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:02","end":"07:20","startHours":7.035858305345397,"endHours":7.3414367627095745,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:54","end":"12:40","startHours":11.906014969586966,"endHours":12.66996111299741,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:02","end":"05:48","startHours":5.030499678892986,"endHours":5.7944458223034285,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:36","end":"06:34","startHours":5.603459286450818,"endHours":6.558391965713871,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:12","end":"14:58","startHours":14.197853399818294,"endHours":14.961799543228736,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:49","end":"18:13","startHours":17.817584116870506,"endHours":18.217584116870505,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:01","end":"18:30","startHours":18.017584116870506,"endHours":18.49505045650203,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:46","end":"19:31","startHours":17.767584116870506,"endHours":19.517584116870506,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:54","end":"00:40","startHours":23.906014969586966,"endHours":24.66996111299741,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:34","end":"07:59","startHours":6.558391965713871,"endHours":7.99079098460845,"quality":"inauspicious"},{"name":"Śubha","start":"07:59","end":"09:25","startHours":7.99079098460845,"endHours":9.42319000350303,"quality":"auspicious"},{"name":"Roga","start":"09:25","end":"10:51","startHours":9.42319000350303,"endHours":10.85558902239761,"quality":"inauspicious"},{"name":"Udveg","start":"10:51","end":"12:17","startHours":10.85558902239761,"endHours":12.287988041292188,"quality":"inauspicious"},{"name":"Chala","start":"12:17","end":"13:43","startHours":12.287988041292188,"endHours":13.720387060186768,"quality":"neutral"},{"name":"Labha","start":"13:43","end":"15:09","startHours":13.720387060186768,"endHours":15.152786079081348,"quality":"auspicious"},{"name":"Amṛta","start":"15:09","end":"16:35","startHours":15.152786079081348,"endHours":16.585185097975927,"quality":"auspicious"},{"name":"Kāla","start":"16:35","end":"18:01","startHours":16.585185097975927,"endHours":18.017584116870506,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:01","end":"19:35","startHours":18.017584116870506,"endHours":19.585185097975927,"quality":"auspicious"},{"name":"Amṛta","start":"19:35","end":"21:09","startHours":19.585185097975927,"endHours":21.152786079081345,"quality":"auspicious"},{"name":"Kāla","start":"21:09","end":"22:43","startHours":21.152786079081345,"endHours":22.720387060186766,"quality":"inauspicious"},{"name":"Śubha","start":"22:43","end":"00:17","startHours":22.720387060186766,"endHours":24.287988041292188,"quality":"auspicious"},{"name":"Roga","start":"00:17","end":"01:51","startHours":24.287988041292188,"endHours":25.85558902239761,"quality":"inauspicious"},{"name":"Udveg","start":"01:51","end":"03:25","startHours":25.85558902239761,"endHours":27.42319000350303,"quality":"inauspicious"},{"name":"Chala","start":"03:25","end":"04:59","startHours":27.42319000350303,"endHours":28.99079098460845,"quality":"neutral"},{"name":"Labha","start":"04:59","end":"06:34","startHours":28.99079098460845,"endHours":30.55839196571387,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:34","end":"07:34","startHours":6.558391965713871,"endHours":7.558391965713871,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:34","end":"08:34","startHours":7.558391965713871,"endHours":8.55839196571387,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:34","end":"09:34","startHours":8.55839196571387,"endHours":9.55839196571387,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:34","end":"10:34","startHours":9.55839196571387,"endHours":10.55839196571387,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:34","end":"11:34","startHours":10.55839196571387,"endHours":11.55839196571387,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:34","end":"12:34","startHours":11.55839196571387,"endHours":12.55839196571387,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:34","end":"13:34","startHours":12.55839196571387,"endHours":13.55839196571387,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:34","end":"14:34","startHours":13.55839196571387,"endHours":14.55839196571387,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:34","end":"15:34","startHours":14.55839196571387,"endHours":15.55839196571387,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:34","end":"16:34","startHours":15.55839196571387,"endHours":16.55839196571387,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:34","end":"17:34","startHours":16.55839196571387,"endHours":17.55839196571387,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:34","end":"18:34","startHours":17.55839196571387,"endHours":18.55839196571387,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:34","end":"19:34","startHours":18.55839196571387,"endHours":19.55839196571387,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:34","end":"20:34","startHours":19.55839196571387,"endHours":20.55839196571387,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:34","end":"21:34","startHours":20.55839196571387,"endHours":21.55839196571387,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:34","end":"22:34","startHours":21.55839196571387,"endHours":22.55839196571387,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:34","end":"23:34","startHours":22.55839196571387,"endHours":23.55839196571387,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:34","end":"00:34","startHours":23.55839196571387,"endHours":24.55839196571387,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:34","end":"01:34","startHours":24.55839196571387,"endHours":25.55839196571387,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:34","end":"02:34","startHours":25.55839196571387,"endHours":26.55839196571387,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:34","end":"03:34","startHours":26.55839196571387,"endHours":27.55839196571387,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:34","end":"04:34","startHours":27.55839196571387,"endHours":28.55839196571387,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:34","end":"05:34","startHours":28.55839196571387,"endHours":29.55839196571387,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:34","end":"06:34","startHours":29.55839196571387,"endHours":30.55839196571387,"planetary_lord":"Mercury"}],"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":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"West","rahuVasa":"East","anandadiYoga":{"name":"Dhvaja","quality":"Auspicious"},"drikRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-23.424059869669033,"eotMinutes":1.851917522468745,"ayanamsa":23.8246}},"calendars":{"vikram_samvat":2054,"vikram_samvatsara":"Vikṛti","saka_samvat":1919,"saka_samvatsara":"Īśvara","bengali_samvat":1404,"malayalam_era":1173,"nanakshahi_year":528,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Kṛṣṇa Pakṣa","solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Kṛṣṇa Ṣaṣṭhī · Vikram 2054 Vikṛti · Śaka 1919 Īśvara"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti. (Approximated as 13/14 January annually; correct via Sun in Dhanu/Makara cusp.)","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":4},{"id":"dhanu-sankranti","name":"Dhanu Saṅkrānti","name_sanskrit":"धनु सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Sagittarius; Dhanu-māsa (Khara-māsa).","vrata":false,"detection":{"sun_rashi":"Dhanu"},"precedence":5}],"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":"erode"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga December 20, 1997 CE · Erode, Tamil Nadu · Vidhyamitra","description":"December 20, 1997 CE for Erode, Tamil Nadu: Kṛṣṇa Ṣaṣṭhī, sūryodaya 06:34, sūryāsta 18:01.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1997-12-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1997-12-20","sa":"https://sa.vidhyamitra.com/city/erode/1997-12-20","hi":"https://hi.vidhyamitra.com/city/erode/1997-12-20","x-default":"https://vidhyamitra.com/city/erode/1997-12-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-17T01:21:37.468Z","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":"2026-05-17T01:21:37.468Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-17T01:21:37.468Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}