{"id":"vidhyamitra:city-day:colombo:1981-03-17:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/colombo/1981-03-17","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-03-17","date_display":"March 17, 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":3,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444680.770833,"kali_year":5082,"ahargana":1856215.2708,"sun":{"sidereal_longitude":332.998,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":110.9568,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":137.9588,"elapsed_within_tithi_degrees":5.9588},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2,"moon_longitude":110.9568,"elapsed_within_degrees":4.2902},"yoga":{"number":7,"name":"Sukarma","sum_longitude":83.9548},"karana":{"half_tithi_index":22,"name":"Bava"},"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":3,"day":17,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444680.770833,"ahargana":1856215.2708,"kali_year":5082,"ayanamsa_lahiri":23.5905,"grahas":{"sun":{"sidereal_longitude":332.77637400000003,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":111.45227399999999,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":2},"retrograde":false,"latitude":0.1706},"mars":{"sidereal_longitude":336.624774,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":305.49147400000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":163.15677400000004,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"venus":{"sidereal_longitude":327.660674,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":163.419574,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":108.7822,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":288.7822,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":3,"day":17,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444680.770833,"kali_year":5082,"ahargana":1856215.2708,"sun":{"sidereal_longitude":332.998,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":110.9568,"rashi":4,"rashi_name":"Karka"},"tithi":{"number":12,"name":"Dvādaśī","paksha":"Śukla","full_name":"Śukla Dvādaśī","elongation_degrees":137.9588,"elapsed_within_tithi_degrees":5.9588},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2,"moon_longitude":110.9568,"elapsed_within_degrees":4.2902},"yoga":{"number":7,"name":"Sukarma","sum_longitude":83.9548},"karana":{"half_tithi_index":22,"name":"Bava"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.171,"elongation":137.959},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.171,"opposition_distance":42.041}},"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":"06:17","sunsetLocal":"18:22","solarNoonLocal":"12:20","dayLengthHours":12.08851731610573,"dayLengthDisplay":"12 Hours 05 Mins 19 Secs","nightLengthDisplay":"11 Hours 54 Mins 41 Secs","moonriseLocal":"15:24","moonsetLocal":"03:45","rahuKala":{"name":"Rāhu Kāla","start":"15:21","end":"16:52","startHours":15.349113352230141,"endHours":16.860178016743358,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:18","end":"10:49","startHours":9.304854694177276,"endHours":10.815919358690493,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:20","end":"13:50","startHours":12.32698402320371,"endHours":13.838048687716926,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:06","end":"09:30","startHours":9.103379405575515,"endHours":9.50632998277904,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:47","end":"07:07","startHours":6.78641358665525,"endHours":7.10877404841807,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:55","end":"12:44","startHours":11.924033446000186,"endHours":12.729934600407235,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:40","end":"05:29","startHours":4.670923056336747,"endHours":5.476824210743796,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:17","end":"06:17","startHours":5.275348922142034,"endHours":6.282725365150845,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:21","end":"15:09","startHours":14.341736909221332,"endHours":15.147638063628381,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:10","end":"18:34","startHours":18.171242681256576,"endHours":18.571242681256575,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:22","end":"18:52","startHours":18.371242681256575,"endHours":18.87493090276098,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:07","end":"19:52","startHours":18.121242681256575,"endHours":19.871242681256575,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:55","end":"00:44","startHours":23.924033446000188,"endHours":24.729934600407233,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:17","end":"07:48","startHours":6.282725365150845,"endHours":7.793790029664061,"quality":"inauspicious"},{"name":"Udveg","start":"07:48","end":"09:18","startHours":7.793790029664061,"endHours":9.304854694177276,"quality":"inauspicious"},{"name":"Chala","start":"09:18","end":"10:49","startHours":9.304854694177276,"endHours":10.815919358690493,"quality":"neutral"},{"name":"Labha","start":"10:49","end":"12:20","startHours":10.815919358690493,"endHours":12.32698402320371,"quality":"auspicious"},{"name":"Amṛta","start":"12:20","end":"13:50","startHours":12.32698402320371,"endHours":13.838048687716926,"quality":"auspicious"},{"name":"Kāla","start":"13:50","end":"15:21","startHours":13.838048687716926,"endHours":15.349113352230141,"quality":"inauspicious"},{"name":"Śubha","start":"15:21","end":"16:52","startHours":15.349113352230141,"endHours":16.860178016743358,"quality":"auspicious"},{"name":"Roga","start":"16:52","end":"18:22","startHours":16.860178016743358,"endHours":18.371242681256575,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:22","end":"19:52","startHours":18.371242681256575,"endHours":19.860178016743358,"quality":"inauspicious"},{"name":"Śubha","start":"19:52","end":"21:21","startHours":19.860178016743358,"endHours":21.34911335223014,"quality":"auspicious"},{"name":"Roga","start":"21:21","end":"22:50","startHours":21.34911335223014,"endHours":22.838048687716928,"quality":"inauspicious"},{"name":"Udveg","start":"22:50","end":"00:20","startHours":22.838048687716928,"endHours":24.32698402320371,"quality":"inauspicious"},{"name":"Chala","start":"00:20","end":"01:49","startHours":24.32698402320371,"endHours":25.815919358690493,"quality":"neutral"},{"name":"Labha","start":"01:49","end":"03:18","startHours":25.815919358690493,"endHours":27.30485469417728,"quality":"auspicious"},{"name":"Amṛta","start":"03:18","end":"04:48","startHours":27.30485469417728,"endHours":28.793790029664063,"quality":"auspicious"},{"name":"Kāla","start":"04:48","end":"06:17","startHours":28.793790029664063,"endHours":30.282725365150846,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:17","end":"07:17","startHours":6.282725365150845,"endHours":7.282725365150845,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:17","end":"08:17","startHours":7.282725365150845,"endHours":8.282725365150846,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:17","end":"09:17","startHours":8.282725365150846,"endHours":9.282725365150846,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:17","end":"10:17","startHours":9.282725365150846,"endHours":10.282725365150846,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:17","end":"11:17","startHours":10.282725365150846,"endHours":11.282725365150846,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:17","end":"12:17","startHours":11.282725365150846,"endHours":12.282725365150846,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:17","end":"13:17","startHours":12.282725365150846,"endHours":13.282725365150846,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:17","end":"14:17","startHours":13.282725365150846,"endHours":14.282725365150846,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:17","end":"15:17","startHours":14.282725365150846,"endHours":15.282725365150846,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:17","end":"16:17","startHours":15.282725365150846,"endHours":16.282725365150846,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:17","end":"17:17","startHours":16.282725365150846,"endHours":17.282725365150846,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:17","end":"18:17","startHours":17.282725365150846,"endHours":18.282725365150846,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:17","end":"19:17","startHours":18.282725365150846,"endHours":19.282725365150846,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:17","end":"20:17","startHours":19.282725365150846,"endHours":20.282725365150846,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:17","end":"21:17","startHours":20.282725365150846,"endHours":21.282725365150846,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:17","end":"22:17","startHours":21.282725365150846,"endHours":22.282725365150846,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:17","end":"23:17","startHours":22.282725365150846,"endHours":23.282725365150846,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:17","end":"00:17","startHours":23.282725365150846,"endHours":24.282725365150846,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:17","end":"01:17","startHours":24.282725365150846,"endHours":25.282725365150846,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:17","end":"02:17","startHours":25.282725365150846,"endHours":26.282725365150846,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:17","end":"03:17","startHours":26.282725365150846,"endHours":27.282725365150846,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:17","end":"04:17","startHours":27.282725365150846,"endHours":28.282725365150846,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:17","end":"05:17","startHours":28.282725365150846,"endHours":29.282725365150846,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:17","end":"06:17","startHours":29.282725365150846,"endHours":30.282725365150846,"planetary_lord":"Saturn"}],"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":["Meṣa","Vṛṣabha","Karka","Kanyā","Dhanu","Makara"],"unfavorable_rashis":["Mithuna","Siṃha","Tulā","Vṛścika","Kumbha","Mīna"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Mṛtyu","quality":"Inauspicious"},"tropicalRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-1.4441969040949783,"eotMinutes":-9.063841392222612,"ayanamsa":23.5905}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Phālguna","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mīna (Paṅkuṇi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Śukla Dvādaśī · 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":[]},"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 March 17, 1981 CE · Colombo, Sri Lanka · Vidhyamitra","description":"March 17, 1981 CE for Colombo, Sri Lanka: Śukla Dvādaśī, sūryodaya 06:17, sūryāsta 18:22.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/colombo/1981-03-17","hreflang_alternates":{"en":"https://vidhyamitra.com/city/colombo/1981-03-17","sa":"https://sa.vidhyamitra.com/city/colombo/1981-03-17","hi":"https://hi.vidhyamitra.com/city/colombo/1981-03-17","x-default":"https://vidhyamitra.com/city/colombo/1981-03-17"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T07:23:36.260Z","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":"2026-06-02T07:23:36.260Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T07:23:36.260Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}