{"id":"vidhyamitra:city-day:ayodhya:1666-04-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/ayodhya/1666-04-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1666-04-18","date_display":"April 18, 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":4,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2329661.770833,"kali_year":4768,"ahargana":1741196.2708,"sun":{"sidereal_longitude":9.8507,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":176.3413,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":166.4907,"elapsed_within_tithi_degrees":10.4907},"nakshatra":{"number":14,"name":"Citrā","pada":1,"moon_longitude":176.3413,"elapsed_within_degrees":3.008},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":186.192},"karana":{"half_tithi_index":27,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":4,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2329661.770833,"ahargana":1741196.2708,"kali_year":4768,"ayanamsa_lahiri":19.1914,"grahas":{"sun":{"sidereal_longitude":8.978545999999994,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":173.98754600000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":1},"retrograde":false,"latitude":4.4925},"mars":{"sidereal_longitude":154.84734600000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":3},"retrograde":true},"mercury":{"sidereal_longitude":19.091746,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":332.9349460000001,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":11.64714600000002,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":275.976546,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":83.0423,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":263.0423,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"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":4,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2329661.770833,"kali_year":4768,"ahargana":1741196.2708,"sun":{"sidereal_longitude":9.8507,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":176.3413,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":166.4907,"elapsed_within_tithi_degrees":10.4907},"nakshatra":{"number":14,"name":"Citrā","pada":1,"moon_longitude":176.3413,"elapsed_within_degrees":3.008},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":186.192},"karana":{"half_tithi_index":27,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.493,"elongation":166.491},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.493,"opposition_distance":13.509}},"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":"05:35","sunsetLocal":"18:27","solarNoonLocal":"12:01","dayLengthHours":12.866200360847174,"dayLengthDisplay":"12 Hours 51 Mins 58 Secs","nightLengthDisplay":"11 Hours 08 Mins 02 Secs","moonriseLocal":"17:09","moonsetLocal":"04:53","rahuKala":{"name":"Rāhu Kāla","start":"16:50","end":"18:27","startHours":16.836127087052965,"endHours":18.444402132158864,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:01","end":"13:37","startHours":12.011301951735277,"endHours":13.619576996841172,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:14","end":"16:50","startHours":15.22785204194707,"endHours":16.836127087052965,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:35","end":"09:01","startHours":8.580315188842697,"endHours":9.009188534204268,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:07","end":"06:27","startHours":6.114293453013655,"endHours":6.457392129302913,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:35","end":"12:26","startHours":11.582428606373705,"endHours":12.440175297096848,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:52","end":"04:43","startHours":3.862708389865399,"endHours":4.720455080588544,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:30","end":"05:35","startHours":4.506018407907758,"endHours":5.578201771311689,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:09","end":"15:01","startHours":14.155668678543137,"endHours":15.013415369266282,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:15","end":"18:39","startHours":18.244402132158864,"endHours":18.644402132158863,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:27","end":"18:59","startHours":18.444402132158864,"endHours":18.98049381386083,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:12","end":"19:57","startHours":18.194402132158864,"endHours":19.944402132158864,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:35","end":"00:26","startHours":23.582428606373703,"endHours":24.44017529709685,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:35","end":"07:11","startHours":5.578201771311689,"endHours":7.186476816417586,"quality":"inauspicious"},{"name":"Chala","start":"07:11","end":"08:48","startHours":7.186476816417586,"endHours":8.794751861523483,"quality":"neutral"},{"name":"Labha","start":"08:48","end":"10:24","startHours":8.794751861523483,"endHours":10.403026906629378,"quality":"auspicious"},{"name":"Amṛta","start":"10:24","end":"12:01","startHours":10.403026906629378,"endHours":12.011301951735277,"quality":"auspicious"},{"name":"Kāla","start":"12:01","end":"13:37","startHours":12.011301951735277,"endHours":13.619576996841172,"quality":"inauspicious"},{"name":"Śubha","start":"13:37","end":"15:14","startHours":13.619576996841172,"endHours":15.22785204194707,"quality":"auspicious"},{"name":"Roga","start":"15:14","end":"16:50","startHours":15.22785204194707,"endHours":16.836127087052965,"quality":"inauspicious"},{"name":"Udveg","start":"16:50","end":"18:27","startHours":16.836127087052965,"endHours":18.444402132158864,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:27","end":"19:50","startHours":18.444402132158864,"endHours":19.836127087052965,"quality":"auspicious"},{"name":"Roga","start":"19:50","end":"21:14","startHours":19.836127087052965,"endHours":21.22785204194707,"quality":"inauspicious"},{"name":"Udveg","start":"21:14","end":"22:37","startHours":21.22785204194707,"endHours":22.619576996841175,"quality":"inauspicious"},{"name":"Chala","start":"22:37","end":"00:01","startHours":22.619576996841175,"endHours":24.011301951735277,"quality":"neutral"},{"name":"Labha","start":"00:01","end":"01:24","startHours":24.011301951735277,"endHours":25.40302690662938,"quality":"auspicious"},{"name":"Amṛta","start":"01:24","end":"02:48","startHours":25.40302690662938,"endHours":26.794751861523483,"quality":"auspicious"},{"name":"Kāla","start":"02:48","end":"04:11","startHours":26.794751861523483,"endHours":28.18647681641759,"quality":"inauspicious"},{"name":"Śubha","start":"04:11","end":"05:35","startHours":28.18647681641759,"endHours":29.57820177131169,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:35","end":"06:35","startHours":5.578201771311689,"endHours":6.578201771311689,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:35","end":"07:35","startHours":6.578201771311689,"endHours":7.578201771311689,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:35","end":"08:35","startHours":7.578201771311689,"endHours":8.57820177131169,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:35","end":"09:35","startHours":8.57820177131169,"endHours":9.57820177131169,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:35","end":"10:35","startHours":9.57820177131169,"endHours":10.57820177131169,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:35","end":"11:35","startHours":10.57820177131169,"endHours":11.57820177131169,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:35","end":"12:35","startHours":11.57820177131169,"endHours":12.57820177131169,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:35","end":"13:35","startHours":12.57820177131169,"endHours":13.57820177131169,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:35","end":"14:35","startHours":13.57820177131169,"endHours":14.57820177131169,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:35","end":"15:35","startHours":14.57820177131169,"endHours":15.57820177131169,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:35","end":"16:35","startHours":15.57820177131169,"endHours":16.57820177131169,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:35","end":"17:35","startHours":16.57820177131169,"endHours":17.57820177131169,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:35","end":"18:35","startHours":17.57820177131169,"endHours":18.57820177131169,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:35","end":"19:35","startHours":18.57820177131169,"endHours":19.57820177131169,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:35","end":"20:35","startHours":19.57820177131169,"endHours":20.57820177131169,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:35","end":"21:35","startHours":20.57820177131169,"endHours":21.57820177131169,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:35","end":"22:35","startHours":21.57820177131169,"endHours":22.57820177131169,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:35","end":"23:35","startHours":22.57820177131169,"endHours":23.57820177131169,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:35","end":"00:35","startHours":23.57820177131169,"endHours":24.57820177131169,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:35","end":"01:35","startHours":24.57820177131169,"endHours":25.57820177131169,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:35","end":"02:35","startHours":25.57820177131169,"endHours":26.57820177131169,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:35","end":"03:35","startHours":26.57820177131169,"endHours":27.57820177131169,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:35","end":"04:35","startHours":27.57820177131169,"endHours":28.57820177131169,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:35","end":"05:35","startHours":28.57820177131169,"endHours":29.57820177131169,"planetary_lord":"Jupiter"}],"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":["Mithuna","Karka","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"West (Paścim)","chandraVasa":"North-West","rahuVasa":"North-East","anandadiYoga":{"name":"Padma","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":10.822374332065475,"eotMinutes":0.5058828958834352,"ayanamsa":19.1914}},"calendars":{"vikram_samvat":1723,"vikram_samvatsara":"Siddhārthī","saka_samvat":1588,"saka_samvatsara":"Parābhava","bengali_samvat":1073,"malayalam_era":842,"nanakshahi_year":197,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Caitra","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Caturdaśī · Vikram 1723 Siddhārthī · Śaka 1588 Parābhava"},"festivals":[],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — 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 April 18, 1666 CE · Ayodhyā · Vidhyamitra","description":"April 18, 1666 CE for Ayodhyā: Śukla Caturdaśī, sūryodaya 05:35, sūryāsta 18:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/ayodhya/1666-04-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/ayodhya/1666-04-18","sa":"https://sa.vidhyamitra.com/city/ayodhya/1666-04-18","hi":"https://hi.vidhyamitra.com/city/ayodhya/1666-04-18","x-default":"https://vidhyamitra.com/city/ayodhya/1666-04-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-06T05:28:55.387Z","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":"2026-06-06T05:28:55.387Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-06T05:28:55.387Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}