{"id":"vidhyamitra:city-day:colombo:1981-04-27:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/colombo/1981-04-27","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-04-27","date_display":"April 27, 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":4,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444721.770833,"kali_year":5083,"ahargana":1856256.2708,"sun":{"sidereal_longitude":13.234,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":282.4586,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":269.2246,"elapsed_within_tithi_degrees":5.2246},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":282.4586,"elapsed_within_degrees":2.4586},"yoga":{"number":23,"name":"Śubha","sum_longitude":295.6927},"karana":{"half_tithi_index":44,"name":"Bālava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":4,"day":27,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444721.770833,"ahargana":1856256.2708,"kali_year":5083,"ayanamsa_lahiri":23.592,"grahas":{"sun":{"sidereal_longitude":13.110907999999995,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":278.654308,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false,"latitude":0.3254},"mars":{"sidereal_longitude":7.960107999999991,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":12.47550799999999,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":158.37830800000006,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":18.47670800000003,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":160.40730800000006,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":106.6098,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":286.6098,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":4,"day":27,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444721.770833,"kali_year":5083,"ahargana":1856256.2708,"sun":{"sidereal_longitude":13.234,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":282.4586,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":269.2246,"elapsed_within_tithi_degrees":5.2246},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1,"moon_longitude":282.4586,"elapsed_within_degrees":2.4586},"yoga":{"number":23,"name":"Śubha","sum_longitude":295.6927},"karana":{"half_tithi_index":44,"name":"Bālava"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.325,"elongation":90.775},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.325,"opposition_distance":89.225}},"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":"05:58","sunsetLocal":"18:18","solarNoonLocal":"12:08","dayLengthHours":12.342435584018311,"dayLengthDisplay":"12 Hours 20 Mins 33 Secs","nightLengthDisplay":"11 Hours 39 Mins 27 Secs","moonriseLocal":"23:58","moonsetLocal":"11:43","rahuKala":{"name":"Rāhu Kāla","start":"07:31","end":"09:03","startHours":7.5086388418329975,"endHours":9.051443289835287,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:36","end":"12:08","startHours":10.594247737837575,"endHours":12.137052185839863,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:41","end":"15:13","startHours":13.679856633842153,"endHours":15.222661081844443,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:51","end":"09:15","startHours":8.845736030101648,"endHours":9.257150549568925,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:29","end":"06:49","startHours":6.480102543164805,"endHours":6.809234158738627,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:44","end":"12:33","startHours":11.725637666372586,"endHours":12.54846670530714,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:19","end":"05:09","startHours":4.3201763159616,"endHours":5.143005354896155,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:56","end":"05:58","startHours":4.937298095162516,"endHours":5.965834393830709,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:12","end":"15:01","startHours":14.19412478317625,"endHours":15.016953822110803,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:06","end":"18:30","startHours":18.10826997784902,"endHours":18.508269977849018,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:18","end":"18:49","startHours":18.30826997784902,"endHours":18.822538127183115,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:03","end":"19:48","startHours":18.05826997784902,"endHours":19.80826997784902,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:44","end":"00:33","startHours":23.725637666372585,"endHours":24.548466705307142,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:58","end":"07:31","startHours":5.965834393830709,"endHours":7.5086388418329975,"quality":"auspicious"},{"name":"Kāla","start":"07:31","end":"09:03","startHours":7.5086388418329975,"endHours":9.051443289835287,"quality":"inauspicious"},{"name":"Śubha","start":"09:03","end":"10:36","startHours":9.051443289835287,"endHours":10.594247737837575,"quality":"auspicious"},{"name":"Roga","start":"10:36","end":"12:08","startHours":10.594247737837575,"endHours":12.137052185839863,"quality":"inauspicious"},{"name":"Udveg","start":"12:08","end":"13:41","startHours":12.137052185839863,"endHours":13.679856633842153,"quality":"inauspicious"},{"name":"Chala","start":"13:41","end":"15:13","startHours":13.679856633842153,"endHours":15.222661081844443,"quality":"neutral"},{"name":"Labha","start":"15:13","end":"16:46","startHours":15.222661081844443,"endHours":16.76546552984673,"quality":"auspicious"},{"name":"Amṛta","start":"16:46","end":"18:18","startHours":16.76546552984673,"endHours":18.30826997784902,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:18","end":"19:46","startHours":18.30826997784902,"endHours":19.76546552984673,"quality":"neutral"},{"name":"Labha","start":"19:46","end":"21:13","startHours":19.76546552984673,"endHours":21.222661081844443,"quality":"auspicious"},{"name":"Amṛta","start":"21:13","end":"22:41","startHours":21.222661081844443,"endHours":22.679856633842153,"quality":"auspicious"},{"name":"Kāla","start":"22:41","end":"00:08","startHours":22.679856633842153,"endHours":24.137052185839863,"quality":"inauspicious"},{"name":"Śubha","start":"00:08","end":"01:36","startHours":24.137052185839863,"endHours":25.594247737837573,"quality":"auspicious"},{"name":"Roga","start":"01:36","end":"03:03","startHours":25.594247737837573,"endHours":27.051443289835284,"quality":"inauspicious"},{"name":"Udveg","start":"03:03","end":"04:31","startHours":27.051443289835284,"endHours":28.508638841832997,"quality":"inauspicious"},{"name":"Chala","start":"04:31","end":"05:58","startHours":28.508638841832997,"endHours":29.965834393830708,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:58","end":"06:58","startHours":5.965834393830709,"endHours":6.965834393830709,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:58","end":"07:58","startHours":6.965834393830709,"endHours":7.965834393830709,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:58","end":"08:58","startHours":7.965834393830709,"endHours":8.965834393830708,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:58","end":"09:58","startHours":8.965834393830708,"endHours":9.965834393830708,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:58","end":"10:58","startHours":9.965834393830708,"endHours":10.965834393830708,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:58","end":"11:58","startHours":10.965834393830708,"endHours":11.965834393830708,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:58","end":"12:58","startHours":11.965834393830708,"endHours":12.965834393830708,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:58","end":"13:58","startHours":12.965834393830708,"endHours":13.965834393830708,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:58","end":"14:58","startHours":13.965834393830708,"endHours":14.965834393830708,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:58","end":"15:58","startHours":14.965834393830708,"endHours":15.965834393830708,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:58","end":"16:58","startHours":15.965834393830708,"endHours":16.965834393830708,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:58","end":"17:58","startHours":16.965834393830708,"endHours":17.965834393830708,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:58","end":"18:58","startHours":17.965834393830708,"endHours":18.965834393830708,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:58","end":"19:58","startHours":18.965834393830708,"endHours":19.965834393830708,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:58","end":"20:58","startHours":19.965834393830708,"endHours":20.965834393830708,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:58","end":"21:58","startHours":20.965834393830708,"endHours":21.965834393830708,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:58","end":"22:58","startHours":21.965834393830708,"endHours":22.965834393830708,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:58","end":"23:58","startHours":22.965834393830708,"endHours":23.965834393830708,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:58","end":"00:58","startHours":23.965834393830708,"endHours":24.965834393830708,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:58","end":"01:58","startHours":24.965834393830708,"endHours":25.965834393830708,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:58","end":"02:58","startHours":25.965834393830708,"endHours":26.965834393830708,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:58","end":"03:58","startHours":26.965834393830708,"endHours":27.965834393830708,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:58","end":"04:58","startHours":27.965834393830708,"endHours":28.965834393830708,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:58","end":"05:58","startHours":28.965834393830708,"endHours":29.965834393830708,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Cara","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":13.751487226176703,"eotMinutes":2.332068849608316,"ayanamsa":23.592}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","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":"Vaiśākha Kṛṣṇa Aṣṭamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — 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}]},"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 April 27, 1981 CE · Colombo, Sri Lanka · Vidhyamitra","description":"April 27, 1981 CE for Colombo, Sri Lanka: Kṛṣṇa Aṣṭamī, sūryodaya 05:58, sūryāsta 18:18.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/colombo/1981-04-27","hreflang_alternates":{"en":"https://vidhyamitra.com/city/colombo/1981-04-27","sa":"https://sa.vidhyamitra.com/city/colombo/1981-04-27","hi":"https://hi.vidhyamitra.com/city/colombo/1981-04-27","x-default":"https://vidhyamitra.com/city/colombo/1981-04-27"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T15:33:52.386Z","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":"2026-06-02T15:33:52.386Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T15:33:52.386Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}