{"id":"vidhyamitra:city-day:colombo:1981-10-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/colombo/1981-10-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-10-20","date_display":"October 20, 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":10,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444897.770833,"kali_year":5083,"ahargana":1856432.2708,"sun":{"sidereal_longitude":182.2881,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":87.9339,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":265.6458,"elapsed_within_tithi_degrees":1.6458},"nakshatra":{"number":7,"name":"Punarvasu","pada":3,"moon_longitude":87.9339,"elapsed_within_degrees":7.9339},"yoga":{"number":21,"name":"Siddha","sum_longitude":270.2219},"karana":{"half_tithi_index":44,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"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":10,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444897.770833,"ahargana":1856432.2708,"kali_year":5083,"ayanamsa_lahiri":23.5988,"grahas":{"sun":{"sidereal_longitude":182.96698300000003,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":91.55688299999997,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false,"latitude":-0.7304},"mars":{"sidereal_longitude":126.04298299999999,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":179.873383,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":178.78968299999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":229.032783,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":170.622483,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":97.2845,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":277.2845,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","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":10,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444897.770833,"kali_year":5083,"ahargana":1856432.2708,"sun":{"sidereal_longitude":182.2881,"rashi":7,"rashi_name":"Tulā"},"moon":{"sidereal_longitude":87.9339,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":265.6458,"elapsed_within_tithi_degrees":1.6458},"nakshatra":{"number":7,"name":"Punarvasu","pada":3,"moon_longitude":87.9339,"elapsed_within_degrees":7.9339},"yoga":{"number":21,"name":"Siddha","sum_longitude":270.2219},"karana":{"half_tithi_index":44,"name":"Bālava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.73,"elongation":94.354},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.73,"opposition_distance":85.646}},"eclipse_window_40days":[]},"city":{"slug":"colombo","name":"Colombo, Sri Lanka","lat":6.9271,"lon":79.8612,"tz_offset_hours":5.5,"country":"LK","tier":"diaspora"},"tier2":{"city":{"slug":"colombo","name":"Colombo, Sri Lanka","lat":6.9271,"lon":79.8612,"tz_offset_hours":5.5,"country":"LK","tier":"diaspora"},"sunriseLocal":"05:56","sunsetLocal":"17:53","solarNoonLocal":"11:55","dayLengthHours":11.945922876211924,"dayLengthDisplay":"11 Hours 56 Mins 45 Secs","nightLengthDisplay":"12 Hours 03 Mins 15 Secs","moonriseLocal":"23:36","moonsetLocal":"12:02","rahuKala":{"name":"Rāhu Kāla","start":"14:54","end":"16:24","startHours":14.900786198315796,"endHours":16.394026557842288,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"08:56","end":"10:25","startHours":8.927824760209834,"endHours":10.421065119736326,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"11:55","end":"13:24","startHours":11.914305479262815,"endHours":13.407545838789307,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:44","end":"09:08","startHours":8.728726045606303,"endHours":9.126923474813367,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:26","end":"06:45","startHours":6.439090827665684,"endHours":6.757648771031335,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:31","end":"12:19","startHours":11.51610805005575,"endHours":12.31250290846988,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:21","end":"05:09","startHours":4.348554324328598,"endHours":5.144949182742725,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:57","end":"05:56","startHours":4.945850468139193,"endHours":5.941344041156854,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"13:54","end":"14:42","startHours":13.905292625298138,"endHours":14.701687483712266,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:41","end":"18:05","startHours":17.687266917368778,"endHours":18.087266917368776,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:53","end":"18:23","startHours":17.887266917368777,"endHours":18.385013703877608,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:38","end":"19:23","startHours":17.637266917368777,"endHours":19.387266917368777,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:31","end":"00:19","startHours":23.516108050055752,"endHours":24.312502908469877,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"05:56","end":"07:26","startHours":5.941344041156854,"endHours":7.434584400683344,"quality":"inauspicious"},{"name":"Udveg","start":"07:26","end":"08:56","startHours":7.434584400683344,"endHours":8.927824760209834,"quality":"inauspicious"},{"name":"Chala","start":"08:56","end":"10:25","startHours":8.927824760209834,"endHours":10.421065119736326,"quality":"neutral"},{"name":"Labha","start":"10:25","end":"11:55","startHours":10.421065119736326,"endHours":11.914305479262815,"quality":"auspicious"},{"name":"Amṛta","start":"11:55","end":"13:24","startHours":11.914305479262815,"endHours":13.407545838789307,"quality":"auspicious"},{"name":"Kāla","start":"13:24","end":"14:54","startHours":13.407545838789307,"endHours":14.900786198315796,"quality":"inauspicious"},{"name":"Śubha","start":"14:54","end":"16:24","startHours":14.900786198315796,"endHours":16.394026557842288,"quality":"auspicious"},{"name":"Roga","start":"16:24","end":"17:53","startHours":16.394026557842288,"endHours":17.887266917368777,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"17:53","end":"19:24","startHours":17.887266917368777,"endHours":19.394026557842288,"quality":"inauspicious"},{"name":"Śubha","start":"19:24","end":"20:54","startHours":19.394026557842288,"endHours":20.900786198315796,"quality":"auspicious"},{"name":"Roga","start":"20:54","end":"22:24","startHours":20.900786198315796,"endHours":22.407545838789304,"quality":"inauspicious"},{"name":"Udveg","start":"22:24","end":"23:55","startHours":22.407545838789304,"endHours":23.914305479262815,"quality":"inauspicious"},{"name":"Chala","start":"23:55","end":"01:25","startHours":23.914305479262815,"endHours":25.421065119736326,"quality":"neutral"},{"name":"Labha","start":"01:25","end":"02:56","startHours":25.421065119736326,"endHours":26.927824760209834,"quality":"auspicious"},{"name":"Amṛta","start":"02:56","end":"04:26","startHours":26.927824760209834,"endHours":28.43458440068334,"quality":"auspicious"},{"name":"Kāla","start":"04:26","end":"05:56","startHours":28.43458440068334,"endHours":29.941344041156853,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"05:56","end":"06:56","startHours":5.941344041156854,"endHours":6.941344041156854,"planetary_lord":"Mars"},{"name":"Hora 2","start":"06:56","end":"07:56","startHours":6.941344041156854,"endHours":7.941344041156854,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"07:56","end":"08:56","startHours":7.941344041156854,"endHours":8.941344041156853,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"08:56","end":"09:56","startHours":8.941344041156853,"endHours":9.941344041156853,"planetary_lord":"Moon"},{"name":"Hora 5","start":"09:56","end":"10:56","startHours":9.941344041156853,"endHours":10.941344041156853,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"10:56","end":"11:56","startHours":10.941344041156853,"endHours":11.941344041156853,"planetary_lord":"Venus"},{"name":"Hora 7","start":"11:56","end":"12:56","startHours":11.941344041156853,"endHours":12.941344041156853,"planetary_lord":"Sun"},{"name":"Hora 8","start":"12:56","end":"13:56","startHours":12.941344041156853,"endHours":13.941344041156853,"planetary_lord":"Mars"},{"name":"Hora 9","start":"13:56","end":"14:56","startHours":13.941344041156853,"endHours":14.941344041156853,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"14:56","end":"15:56","startHours":14.941344041156853,"endHours":15.941344041156853,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"15:56","end":"16:56","startHours":15.941344041156853,"endHours":16.941344041156853,"planetary_lord":"Moon"},{"name":"Hora 12","start":"16:56","end":"17:56","startHours":16.941344041156853,"endHours":17.941344041156853,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"17:56","end":"18:56","startHours":17.941344041156853,"endHours":18.941344041156853,"planetary_lord":"Venus"},{"name":"Hora 14","start":"18:56","end":"19:56","startHours":18.941344041156853,"endHours":19.941344041156853,"planetary_lord":"Sun"},{"name":"Hora 15","start":"19:56","end":"20:56","startHours":19.941344041156853,"endHours":20.941344041156853,"planetary_lord":"Mars"},{"name":"Hora 16","start":"20:56","end":"21:56","startHours":20.941344041156853,"endHours":21.941344041156853,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"21:56","end":"22:56","startHours":21.941344041156853,"endHours":22.941344041156853,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"22:56","end":"23:56","startHours":22.941344041156853,"endHours":23.941344041156853,"planetary_lord":"Moon"},{"name":"Hora 19","start":"23:56","end":"00:56","startHours":23.941344041156853,"endHours":24.941344041156853,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"00:56","end":"01:56","startHours":24.941344041156853,"endHours":25.941344041156853,"planetary_lord":"Venus"},{"name":"Hora 21","start":"01:56","end":"02:56","startHours":25.941344041156853,"endHours":26.941344041156853,"planetary_lord":"Sun"},{"name":"Hora 22","start":"02:56","end":"03:56","startHours":26.941344041156853,"endHours":27.941344041156853,"planetary_lord":"Mars"},{"name":"Hora 23","start":"03:56","end":"04:56","startHours":27.941344041156853,"endHours":28.941344041156853,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"04:56","end":"05:56","startHours":28.941344041156853,"endHours":29.941344041156853,"planetary_lord":"Saturn"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva 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":"North","anandadiYoga":{"name":"Lumba","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-10.246061819820767,"eotMinutes":15.696871244231174,"ayanamsa":23.5988}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Kārtika","lunar_month_paksha_full":"Kārtika Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Kārtika","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Kārtika Kṛṣṇa Aṣṭamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"mangala-walk","name":"Maṅgala Walk","name_sanskrit":"मङ्गल यात्रा","type":"graha","description":"Right action + BG 2.31-38 (kṣatriya-dharma).","step_count":7,"url":"/walk/mangala-walk"},"reason":"Maṅgalavāra (Tuesday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3226-07-09","event":"Bhagavān Krishna's birth at Mathurā","chart_id":"krishna","shared_marker":"same Kṛṣṇa Aṣṭamī","url":"/day/-3226-07-09","relevance":0.5},{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Punarvasu","url":"/day/-1626101-04-03","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"colombo"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga October 20, 1981 CE · Colombo, Sri Lanka · Vidhyamitra","description":"October 20, 1981 CE for Colombo, Sri Lanka: Kṛṣṇa Aṣṭamī, sūryodaya 05:56, sūryāsta 17:53.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/colombo/1981-10-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/colombo/1981-10-20","sa":"https://sa.vidhyamitra.com/city/colombo/1981-10-20","hi":"https://hi.vidhyamitra.com/city/colombo/1981-10-20","x-default":"https://vidhyamitra.com/city/colombo/1981-10-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T15:09:32.998Z","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":"2026-06-02T15:09:32.998Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T15:09:32.998Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}