{"id":"vidhyamitra:city-day:ayodhya:1666-12-15:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ayodhya/1666-12-15","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1666-12-15","date_display":"December 15, 1666 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":1666,"month":12,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2329902.770833,"kali_year":4768,"ahargana":1741437.2708,"sun":{"sidereal_longitude":244.6917,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":106.0182,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":221.3265,"elapsed_within_tithi_degrees":5.3265},"nakshatra":{"number":8,"name":"Puṣya","pada":4,"moon_longitude":106.0182,"elapsed_within_degrees":12.6849},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":350.71},"karana":{"half_tithi_index":36,"name":"Bava"},"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":1666,"month":12,"day":15,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2329902.770833,"ahargana":1741437.2708,"kali_year":4768,"ayanamsa_lahiri":19.2006,"grahas":{"sun":{"sidereal_longitude":244.24563799999999,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":2},"retrograde":false},"moon":{"sidereal_longitude":104.268238,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false,"latitude":2.627},"mars":{"sidereal_longitude":285.55553800000007,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":261.031438,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":335.84853799999996,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":295.23323800000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":274.97733800000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":70.273,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":250.273,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","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":1666,"month":12,"day":15,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2329902.770833,"kali_year":4768,"ahargana":1741437.2708,"sun":{"sidereal_longitude":244.6917,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":106.0182,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":221.3265,"elapsed_within_tithi_degrees":5.3265},"nakshatra":{"number":8,"name":"Puṣya","pada":4,"moon_longitude":106.0182,"elapsed_within_degrees":12.6849},"yoga":{"number":27,"name":"Vaidhṛti","sum_longitude":350.71},"karana":{"half_tithi_index":36,"name":"Bava"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.627,"elongation":138.673},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.627,"opposition_distance":41.327}},"eclipse_window_40days":[]},"city":{"slug":"ayodhya","name":"Ayodhyā","lat":26.799,"lon":82.204,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"ayodhya","name":"Ayodhyā","lat":26.799,"lon":82.204,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"06:43","sunsetLocal":"17:11","solarNoonLocal":"11:57","dayLengthHours":10.46534286154855,"dayLengthDisplay":"10 Hours 27 Mins 55 Secs","nightLengthDisplay":"13 Hours 32 Mins 05 Secs","moonriseLocal":"19:53","moonsetLocal":"09:21","rahuKala":{"name":"Rāhu Kāla","start":"11:57","end":"13:15","startHours":11.950101082773799,"endHours":13.258268940467367,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:02","end":"09:20","startHours":8.025597509693092,"endHours":9.333765367386661,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:39","end":"11:57","startHours":10.64193322508023,"endHours":11.950101082773799,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:10","end":"09:30","startHours":9.159342986360853,"endHours":9.508187748412471,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:09","end":"07:26","startHours":7.153485604564048,"endHours":7.432561414205342,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:36","end":"12:18","startHours":11.60125632072218,"endHours":12.298945844825417,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:19","end":"06:01","startHours":5.322050603793052,"endHours":6.019740127896288,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:51","end":"06:43","startHours":5.845317746870479,"endHours":6.717429651999525,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:42","end":"14:24","startHours":13.69432489303189,"endHours":14.392014417135126,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"16:59","end":"17:23","startHours":16.982772513548074,"endHours":17.382772513548073,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:11","end":"17:37","startHours":17.182772513548073,"endHours":17.618828466112596,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"16:56","end":"18:41","startHours":16.932772513548073,"endHours":18.682772513548073,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:36","end":"00:18","startHours":23.60125632072218,"endHours":24.29894584482542,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:43","end":"08:02","startHours":6.717429651999525,"endHours":8.025597509693092,"quality":"auspicious"},{"name":"Amṛta","start":"08:02","end":"09:20","startHours":8.025597509693092,"endHours":9.333765367386661,"quality":"auspicious"},{"name":"Kāla","start":"09:20","end":"10:39","startHours":9.333765367386661,"endHours":10.64193322508023,"quality":"inauspicious"},{"name":"Śubha","start":"10:39","end":"11:57","startHours":10.64193322508023,"endHours":11.950101082773799,"quality":"auspicious"},{"name":"Roga","start":"11:57","end":"13:15","startHours":11.950101082773799,"endHours":13.258268940467367,"quality":"inauspicious"},{"name":"Udveg","start":"13:15","end":"14:34","startHours":13.258268940467367,"endHours":14.566436798160936,"quality":"inauspicious"},{"name":"Chala","start":"14:34","end":"15:52","startHours":14.566436798160936,"endHours":15.874604655854505,"quality":"neutral"},{"name":"Labha","start":"15:52","end":"17:11","startHours":15.874604655854505,"endHours":17.182772513548073,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"17:11","end":"18:52","startHours":17.182772513548073,"endHours":18.874604655854505,"quality":"inauspicious"},{"name":"Chala","start":"18:52","end":"20:34","startHours":18.874604655854505,"endHours":20.566436798160936,"quality":"neutral"},{"name":"Labha","start":"20:34","end":"22:15","startHours":20.566436798160936,"endHours":22.258268940467367,"quality":"auspicious"},{"name":"Amṛta","start":"22:15","end":"23:57","startHours":22.258268940467367,"endHours":23.9501010827738,"quality":"auspicious"},{"name":"Kāla","start":"23:57","end":"01:39","startHours":23.9501010827738,"endHours":25.64193322508023,"quality":"inauspicious"},{"name":"Śubha","start":"01:39","end":"03:20","startHours":25.64193322508023,"endHours":27.33376536738666,"quality":"auspicious"},{"name":"Roga","start":"03:20","end":"05:02","startHours":27.33376536738666,"endHours":29.025597509693092,"quality":"inauspicious"},{"name":"Udveg","start":"05:02","end":"06:43","startHours":29.025597509693092,"endHours":30.717429651999524,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:43","end":"07:43","startHours":6.717429651999525,"endHours":7.717429651999525,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:43","end":"08:43","startHours":7.717429651999525,"endHours":8.717429651999524,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:43","end":"09:43","startHours":8.717429651999524,"endHours":9.717429651999524,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:43","end":"10:43","startHours":9.717429651999524,"endHours":10.717429651999524,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:43","end":"11:43","startHours":10.717429651999524,"endHours":11.717429651999524,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:43","end":"12:43","startHours":11.717429651999524,"endHours":12.717429651999524,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:43","end":"13:43","startHours":12.717429651999524,"endHours":13.717429651999524,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:43","end":"14:43","startHours":13.717429651999524,"endHours":14.717429651999524,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:43","end":"15:43","startHours":14.717429651999524,"endHours":15.717429651999524,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:43","end":"16:43","startHours":15.717429651999524,"endHours":16.717429651999524,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:43","end":"17:43","startHours":16.717429651999524,"endHours":17.717429651999524,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:43","end":"18:43","startHours":17.717429651999524,"endHours":18.717429651999524,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:43","end":"19:43","startHours":18.717429651999524,"endHours":19.717429651999524,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:43","end":"20:43","startHours":19.717429651999524,"endHours":20.717429651999524,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:43","end":"21:43","startHours":20.717429651999524,"endHours":21.717429651999524,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:43","end":"22:43","startHours":21.717429651999524,"endHours":22.717429651999524,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:43","end":"23:43","startHours":22.717429651999524,"endHours":23.717429651999524,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:43","end":"00:43","startHours":23.717429651999524,"endHours":24.717429651999524,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:43","end":"01:43","startHours":24.717429651999524,"endHours":25.717429651999524,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:43","end":"02:43","startHours":25.717429651999524,"endHours":26.717429651999524,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:43","end":"03:43","startHours":26.717429651999524,"endHours":27.717429651999524,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:43","end":"04:43","startHours":27.717429651999524,"endHours":28.717429651999524,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:43","end":"05:43","startHours":28.717429651999524,"endHours":29.717429651999524,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:43","end":"06:43","startHours":29.717429651999524,"endHours":30.717429651999524,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"South-West","anandadiYoga":{"name":"Śubha","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":-23.274291509975907,"eotMinutes":4.177935033572184,"ayanamsa":19.2006}},"calendars":{"vikram_samvat":1723,"vikram_samvatsara":"Siddhārthī","saka_samvat":1588,"saka_samvatsara":"Parābhava","bengali_samvat":1073,"malayalam_era":842,"nanakshahi_year":197,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","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":"Pauṣa Kṛṣṇa Caturthī · Vikram 1723 Siddhārthī · Śaka 1588 Parābhava"},"festivals":[{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"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":"ayodhya"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga December 15, 1666 CE · Ayodhyā · Vidhyamitra","description":"December 15, 1666 CE for Ayodhyā: Kṛṣṇa Caturthī, sūryodaya 06:43, sūryāsta 17:11.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ayodhya/1666-12-15","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ayodhya/1666-12-15","sa":"https://sa.vidhyamitra.com/city/ayodhya/1666-12-15","hi":"https://hi.vidhyamitra.com/city/ayodhya/1666-12-15","x-default":"https://vidhyamitra.com/city/ayodhya/1666-12-15"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-06T06:59:18.601Z","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":"2026-06-06T06:59:18.601Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-06T06:59:18.601Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}