{"id":"vidhyamitra:city-day:colombo:2016-04-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/colombo/2016-04-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2016-04-13","date_display":"April 13, 2016 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":2016,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457491.770833,"kali_year":5117,"ahargana":1869026.2708,"sun":{"sidereal_longitude":359.5672,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":72.4205,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":72.8533,"elapsed_within_tithi_degrees":0.8533},"nakshatra":{"number":6,"name":"Ārdrā","pada":2,"moon_longitude":72.4205,"elapsed_within_degrees":5.7539},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":71.9878},"karana":{"half_tithi_index":12,"name":"Gara"},"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":2016,"month":4,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2457491.770833,"ahargana":1869026.2708,"kali_year":5117,"ayanamsa_lahiri":24.0804,"grahas":{"sun":{"sidereal_longitude":359.4699,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"moon":{"sidereal_longitude":75.60000000000002,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false,"latitude":-4.3944},"mars":{"sidereal_longitude":224.47669999999994,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":17.72120000000001,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":139.54520000000002,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":true},"venus":{"sidereal_longitude":344.7991,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":231.83709999999996,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":149.9938,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":329.9938,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","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":2016,"month":4,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457491.770833,"kali_year":5117,"ahargana":1869026.2708,"sun":{"sidereal_longitude":359.5672,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":72.4205,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":72.8533,"elapsed_within_tithi_degrees":0.8533},"nakshatra":{"number":6,"name":"Ārdrā","pada":2,"moon_longitude":72.4205,"elapsed_within_degrees":5.7539},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":71.9878},"karana":{"half_tithi_index":12,"name":"Gara"},"vara":{"number":5,"name":"Budhavāra (Wednesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.394,"elongation":72.853},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.394,"opposition_distance":107.147}},"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":"06:03","sunsetLocal":"18:19","solarNoonLocal":"12:11","dayLengthHours":12.26276567357715,"dayLengthDisplay":"12 Hours 15 Mins 46 Secs","nightLengthDisplay":"11 Hours 44 Mins 14 Secs","moonriseLocal":"11:01","moonsetLocal":"23:30","rahuKala":{"name":"Rāhu Kāla","start":"12:11","end":"13:43","startHours":12.188750180495074,"endHours":13.721595889692217,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"07:35","end":"09:07","startHours":7.590213052903644,"endHours":9.123058762100786,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"10:39","end":"12:11","startHours":10.65590447129793,"endHours":12.188750180495074,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:55","end":"09:20","startHours":8.918679334207834,"endHours":9.327438189993739,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:34","end":"06:54","startHours":6.568315913438881,"endHours":6.895322998067605,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:47","end":"12:36","startHours":11.779991324709169,"endHours":12.597509036280979,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:25","end":"05:14","startHours":4.42233192056288,"endHours":5.23984963213469,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:02","end":"06:03","startHours":5.035470204241737,"endHours":6.0573673437065,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:14","end":"15:03","startHours":14.232544459424599,"endHours":15.050062170996409,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:07","end":"18:31","startHours":18.12013301728365,"endHours":18.520133017283648,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:19","end":"18:50","startHours":18.32013301728365,"endHours":18.83108158701603,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:04","end":"19:49","startHours":18.07013301728365,"endHours":19.82013301728365,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:47","end":"00:36","startHours":23.77999132470917,"endHours":24.59750903628098,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Labha","start":"06:03","end":"07:35","startHours":6.0573673437065,"endHours":7.590213052903644,"quality":"auspicious"},{"name":"Amṛta","start":"07:35","end":"09:07","startHours":7.590213052903644,"endHours":9.123058762100786,"quality":"auspicious"},{"name":"Kāla","start":"09:07","end":"10:39","startHours":9.123058762100786,"endHours":10.65590447129793,"quality":"inauspicious"},{"name":"Śubha","start":"10:39","end":"12:11","startHours":10.65590447129793,"endHours":12.188750180495074,"quality":"auspicious"},{"name":"Roga","start":"12:11","end":"13:43","startHours":12.188750180495074,"endHours":13.721595889692217,"quality":"inauspicious"},{"name":"Udveg","start":"13:43","end":"15:15","startHours":13.721595889692217,"endHours":15.254441598889361,"quality":"inauspicious"},{"name":"Chala","start":"15:15","end":"16:47","startHours":15.254441598889361,"endHours":16.787287308086505,"quality":"neutral"},{"name":"Labha","start":"16:47","end":"18:19","startHours":16.787287308086505,"endHours":18.32013301728365,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Udveg","start":"18:19","end":"19:47","startHours":18.32013301728365,"endHours":19.787287308086505,"quality":"inauspicious"},{"name":"Chala","start":"19:47","end":"21:15","startHours":19.787287308086505,"endHours":21.25444159888936,"quality":"neutral"},{"name":"Labha","start":"21:15","end":"22:43","startHours":21.25444159888936,"endHours":22.721595889692217,"quality":"auspicious"},{"name":"Amṛta","start":"22:43","end":"00:11","startHours":22.721595889692217,"endHours":24.188750180495074,"quality":"auspicious"},{"name":"Kāla","start":"00:11","end":"01:39","startHours":24.188750180495074,"endHours":25.65590447129793,"quality":"inauspicious"},{"name":"Śubha","start":"01:39","end":"03:07","startHours":25.65590447129793,"endHours":27.123058762100786,"quality":"auspicious"},{"name":"Roga","start":"03:07","end":"04:35","startHours":27.123058762100786,"endHours":28.590213052903643,"quality":"inauspicious"},{"name":"Udveg","start":"04:35","end":"06:03","startHours":28.590213052903643,"endHours":30.0573673437065,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:03","end":"07:03","startHours":6.0573673437065,"endHours":7.0573673437065,"planetary_lord":"Mercury"},{"name":"Hora 2","start":"07:03","end":"08:03","startHours":7.0573673437065,"endHours":8.057367343706499,"planetary_lord":"Venus"},{"name":"Hora 3","start":"08:03","end":"09:03","startHours":8.057367343706499,"endHours":9.057367343706499,"planetary_lord":"Sun"},{"name":"Hora 4","start":"09:03","end":"10:03","startHours":9.057367343706499,"endHours":10.057367343706499,"planetary_lord":"Mars"},{"name":"Hora 5","start":"10:03","end":"11:03","startHours":10.057367343706499,"endHours":11.057367343706499,"planetary_lord":"Jupiter"},{"name":"Hora 6","start":"11:03","end":"12:03","startHours":11.057367343706499,"endHours":12.057367343706499,"planetary_lord":"Saturn"},{"name":"Hora 7","start":"12:03","end":"13:03","startHours":12.057367343706499,"endHours":13.057367343706499,"planetary_lord":"Moon"},{"name":"Hora 8","start":"13:03","end":"14:03","startHours":13.057367343706499,"endHours":14.057367343706499,"planetary_lord":"Mercury"},{"name":"Hora 9","start":"14:03","end":"15:03","startHours":14.057367343706499,"endHours":15.057367343706499,"planetary_lord":"Venus"},{"name":"Hora 10","start":"15:03","end":"16:03","startHours":15.057367343706499,"endHours":16.0573673437065,"planetary_lord":"Sun"},{"name":"Hora 11","start":"16:03","end":"17:03","startHours":16.0573673437065,"endHours":17.0573673437065,"planetary_lord":"Mars"},{"name":"Hora 12","start":"17:03","end":"18:03","startHours":17.0573673437065,"endHours":18.0573673437065,"planetary_lord":"Jupiter"},{"name":"Hora 13","start":"18:03","end":"19:03","startHours":18.0573673437065,"endHours":19.0573673437065,"planetary_lord":"Saturn"},{"name":"Hora 14","start":"19:03","end":"20:03","startHours":19.0573673437065,"endHours":20.0573673437065,"planetary_lord":"Moon"},{"name":"Hora 15","start":"20:03","end":"21:03","startHours":20.0573673437065,"endHours":21.0573673437065,"planetary_lord":"Mercury"},{"name":"Hora 16","start":"21:03","end":"22:03","startHours":21.0573673437065,"endHours":22.0573673437065,"planetary_lord":"Venus"},{"name":"Hora 17","start":"22:03","end":"23:03","startHours":22.0573673437065,"endHours":23.0573673437065,"planetary_lord":"Sun"},{"name":"Hora 18","start":"23:03","end":"00:03","startHours":23.0573673437065,"endHours":24.0573673437065,"planetary_lord":"Mars"},{"name":"Hora 19","start":"00:03","end":"01:03","startHours":24.0573673437065,"endHours":25.0573673437065,"planetary_lord":"Jupiter"},{"name":"Hora 20","start":"01:03","end":"02:03","startHours":25.0573673437065,"endHours":26.0573673437065,"planetary_lord":"Saturn"},{"name":"Hora 21","start":"02:03","end":"03:03","startHours":26.0573673437065,"endHours":27.0573673437065,"planetary_lord":"Moon"},{"name":"Hora 22","start":"03:03","end":"04:03","startHours":27.0573673437065,"endHours":28.0573673437065,"planetary_lord":"Mercury"},{"name":"Hora 23","start":"04:03","end":"05:03","startHours":28.0573673437065,"endHours":29.0573673437065,"planetary_lord":"Venus"},{"name":"Hora 24","start":"05:03","end":"06:03","startHours":29.0573673437065,"endHours":30.0573673437065,"planetary_lord":"Sun"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South","rahuVasa":"South-West","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":9.143959201230652,"eotMinutes":-0.7698108297043191,"ayanamsa":24.0804}},"calendars":{"vikram_samvat":2073,"vikram_samvatsara":"Saumya","saka_samvat":1938,"saka_samvatsara":"Durmukhi","bengali_samvat":1423,"malayalam_era":1192,"nanakshahi_year":547,"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":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Saptamī · Vikram 2073 Saumya · Śaka 1938 Durmukhi"},"festivals":[{"id":"mesha-sankranti","name":"Meṣa Saṅkrānti (Vaiśākhī / Vishu / Pohelā Boishākh / Bihu)","name_sanskrit":"मेष सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aries; solar new year. Regional: Vaiśākhī (Punjab) · Vishu (Kerala) · Pohelā Boishākh (Bengal) · Bihu (Assam) · Tamil Puthāṇḍu.","vrata":false,"detection":{"sun_rashi_ingress":"Meṣa"},"precedence":1},{"id":"baisakhi","name":"Baisakhi (Vaiśākhī)","name_sanskrit":"वैशाखी","tradition":"Regional","associated_deity":"Sūrya + Khalsa Pantha (Sikh)","significance":"Punjab New Year + Sikh Khalsa founding day.","vrata":false,"detection":{"sun_rashi_ingress":"Meṣa"},"precedence":2}],"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":"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 13, 2016 CE · Colombo, Sri Lanka · Vidhyamitra","description":"April 13, 2016 CE for Colombo, Sri Lanka: Śukla Saptamī, sūryodaya 06:03, sūryāsta 18:19.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/colombo/2016-04-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/colombo/2016-04-13","sa":"https://sa.vidhyamitra.com/city/colombo/2016-04-13","hi":"https://hi.vidhyamitra.com/city/colombo/2016-04-13","x-default":"https://vidhyamitra.com/city/colombo/2016-04-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T22:59:03.676Z","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":"2026-06-02T22:59:03.676Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T22:59:03.676Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}