{"id":"vidhyamitra:city-day:erode:1966-12-21:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/erode/1966-12-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1966-12-21","date_display":"December 21, 1966 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":1966,"month":12,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439480.770833,"kali_year":5068,"ahargana":1851015.2708,"sun":{"sidereal_longitude":245.0749,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":347.6455,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":102.5706,"elapsed_within_tithi_degrees":6.5706},"nakshatra":{"number":27,"name":"Revatī","pada":1,"moon_longitude":347.6455,"elapsed_within_degrees":0.9788},"yoga":{"number":18,"name":"Varīyān","sum_longitude":232.7204},"karana":{"half_tithi_index":17,"name":"Kaulava"},"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":1966,"month":12,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2439480.770833,"ahargana":1851015.2708,"kali_year":5068,"ayanamsa_lahiri":23.3916,"grahas":{"sun":{"sidereal_longitude":245.32935299999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"moon":{"sidereal_longitude":347.642153,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false,"latitude":-2.6849},"mars":{"sidereal_longitude":165.87055299999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":230.35115299999995,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":100.16365300000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":true},"venus":{"sidereal_longitude":256.049353,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":330.70315299999993,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":24.3032,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":204.3032,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","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":1966,"month":12,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439480.770833,"kali_year":5068,"ahargana":1851015.2708,"sun":{"sidereal_longitude":245.0749,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":347.6455,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":9,"name":"Navamī","paksha":"Śukla","full_name":"Śukla Navamī","elongation_degrees":102.5706,"elapsed_within_tithi_degrees":6.5706},"nakshatra":{"number":27,"name":"Revatī","pada":1,"moon_longitude":347.6455,"elapsed_within_degrees":0.9788},"yoga":{"number":18,"name":"Varīyān","sum_longitude":232.7204},"karana":{"half_tithi_index":17,"name":"Kaulava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.685,"elongation":102.571},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.685,"opposition_distance":77.429}},"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":"18:02","solarNoonLocal":"12:18","dayLengthHours":11.45899893119882,"dayLengthDisplay":"11 Hours 27 Mins 32 Secs","nightLengthDisplay":"12 Hours 32 Mins 28 Secs","moonriseLocal":"13:01","moonsetLocal":"01:13","rahuKala":{"name":"Rāhu Kāla","start":"12:18","end":"13:44","startHours":12.295809509884297,"endHours":13.728184376284148,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:00","end":"09:26","startHours":7.998684910684738,"endHours":9.431059777084592,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:52","end":"12:18","startHours":10.863434643484442,"endHours":12.295809509884297,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:14","end":"09:37","startHours":9.24007646156461,"endHours":9.62204309260457,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:03","end":"07:21","startHours":7.043768333084836,"endHours":7.349341637916805,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:41","startHours":11.913842878844337,"endHours":12.677776140924257,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:02","end":"05:48","startHours":5.038443520125043,"endHours":5.802376782204965,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:37","end":"06:34","startHours":5.611393466684984,"endHours":6.566310044284886,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:12","end":"14:58","startHours":14.205642665084099,"endHours":14.969575927164021,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:50","end":"18:14","startHours":17.825308975483708,"endHours":18.225308975483706,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:02","end":"18:30","startHours":18.025308975483707,"endHours":18.50276726428366,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:47","end":"19:32","startHours":17.775308975483707,"endHours":19.525308975483707,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:41","startHours":23.913842878844335,"endHours":24.67777614092426,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:34","end":"08:00","startHours":6.566310044284886,"endHours":7.998684910684738,"quality":"auspicious"},{"name":"Amṛta","start":"08:00","end":"09:26","startHours":7.998684910684738,"endHours":9.431059777084592,"quality":"auspicious"},{"name":"Kāla","start":"09:26","end":"10:52","startHours":9.431059777084592,"endHours":10.863434643484442,"quality":"inauspicious"},{"name":"Śubha","start":"10:52","end":"12:18","startHours":10.863434643484442,"endHours":12.295809509884297,"quality":"auspicious"},{"name":"Roga","start":"12:18","end":"13:44","startHours":12.295809509884297,"endHours":13.728184376284148,"quality":"inauspicious"},{"name":"Udveg","start":"13:44","end":"15:10","startHours":13.728184376284148,"endHours":15.160559242684002,"quality":"inauspicious"},{"name":"Chala","start":"15:10","end":"16:36","startHours":15.160559242684002,"endHours":16.592934109083853,"quality":"neutral"},{"name":"Labha","start":"16:36","end":"18:02","startHours":16.592934109083853,"endHours":18.025308975483707,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:02","end":"19:36","startHours":18.025308975483707,"endHours":19.592934109083856,"quality":"inauspicious"},{"name":"Chala","start":"19:36","end":"21:10","startHours":19.592934109083856,"endHours":21.160559242684002,"quality":"neutral"},{"name":"Labha","start":"21:10","end":"22:44","startHours":21.160559242684002,"endHours":22.728184376284148,"quality":"auspicious"},{"name":"Amṛta","start":"22:44","end":"00:18","startHours":22.728184376284148,"endHours":24.295809509884297,"quality":"auspicious"},{"name":"Kāla","start":"00:18","end":"01:52","startHours":24.295809509884297,"endHours":25.863434643484446,"quality":"inauspicious"},{"name":"Śubha","start":"01:52","end":"03:26","startHours":25.863434643484446,"endHours":27.43105977708459,"quality":"auspicious"},{"name":"Roga","start":"03:26","end":"05:00","startHours":27.43105977708459,"endHours":28.998684910684737,"quality":"inauspicious"},{"name":"Udveg","start":"05:00","end":"06:34","startHours":28.998684910684737,"endHours":30.566310044284887,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:34","end":"07:34","startHours":6.566310044284886,"endHours":7.566310044284886,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:34","end":"08:34","startHours":7.566310044284886,"endHours":8.566310044284887,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:34","end":"09:34","startHours":8.566310044284887,"endHours":9.566310044284887,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:34","end":"10:34","startHours":9.566310044284887,"endHours":10.566310044284887,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:34","end":"11:34","startHours":10.566310044284887,"endHours":11.566310044284887,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:34","end":"12:34","startHours":11.566310044284887,"endHours":12.566310044284887,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:34","end":"13:34","startHours":12.566310044284887,"endHours":13.566310044284887,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:34","end":"14:34","startHours":13.566310044284887,"endHours":14.566310044284887,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:34","end":"15:34","startHours":14.566310044284887,"endHours":15.566310044284887,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:34","end":"16:34","startHours":15.566310044284887,"endHours":16.566310044284887,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:34","end":"17:34","startHours":16.566310044284887,"endHours":17.566310044284887,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:34","end":"18:34","startHours":17.566310044284887,"endHours":18.566310044284887,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:34","end":"19:34","startHours":18.566310044284887,"endHours":19.566310044284887,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:34","end":"20:34","startHours":19.566310044284887,"endHours":20.566310044284887,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:34","end":"21:34","startHours":20.566310044284887,"endHours":21.566310044284887,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:34","end":"22:34","startHours":21.566310044284887,"endHours":22.566310044284887,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:34","end":"23:34","startHours":22.566310044284887,"endHours":23.566310044284887,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:34","end":"00:34","startHours":23.566310044284887,"endHours":24.566310044284887,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:34","end":"01:34","startHours":24.566310044284887,"endHours":25.566310044284887,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:34","end":"02:34","startHours":25.566310044284887,"endHours":26.566310044284887,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:34","end":"03:34","startHours":26.566310044284887,"endHours":27.566310044284887,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:34","end":"04:34","startHours":27.566310044284887,"endHours":28.566310044284887,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:34","end":"05:34","startHours":28.566310044284887,"endHours":29.566310044284887,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:34","end":"06:34","startHours":29.566310044284887,"endHours":30.566310044284887,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"South-West","anandadiYoga":{"name":"Chatra","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.43031162730947,"eotMinutes":1.382629406942221,"ayanamsa":23.3916}},"calendars":{"vikram_samvat":2023,"vikram_samvatsara":"Siddhārthī","saka_samvat":1888,"saka_samvatsara":"Parābhava","bengali_samvat":1373,"malayalam_era":1142,"nanakshahi_year":497,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Śukla Navamī · Vikram 2023 Siddhārthī · Śaka 1888 Parābhava"},"festivals":[],"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":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Śukla Navamī","url":"/day/-1626101-04-03","relevance":0.5}]},"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 21, 1966 CE · Erode, Tamil Nadu · Vidhyamitra","description":"December 21, 1966 CE for Erode, Tamil Nadu: Śukla Navamī, sūryodaya 06:34, sūryāsta 18:02.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/erode/1966-12-21","hreflang_alternates":{"en":"https://vidhyamitra.com/city/erode/1966-12-21","sa":"https://sa.vidhyamitra.com/city/erode/1966-12-21","hi":"https://hi.vidhyamitra.com/city/erode/1966-12-21","x-default":"https://vidhyamitra.com/city/erode/1966-12-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T08:16:34.773Z","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":"2026-06-02T08:16:34.773Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T08:16:34.773Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}