{"id":"vidhyamitra:city-day:colombo:2026-08-20:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/colombo/2026-08-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2026-08-20","date_display":"August 20, 2026 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":2026,"month":8,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461272.770833,"kali_year":5128,"ahargana":1872807.2708,"sun":{"sidereal_longitude":122.1378,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":210.6674,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":88.5296,"elapsed_within_tithi_degrees":4.5296},"nakshatra":{"number":16,"name":"Viśākhā","pada":4,"moon_longitude":210.6674,"elapsed_within_degrees":10.6674},"yoga":{"number":25,"name":"Brahma","sum_longitude":332.8052},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"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":2026,"month":8,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2461272.770833,"ahargana":1872807.2708,"kali_year":5128,"ayanamsa_lahiri":24.2251,"grahas":{"sun":{"sidereal_longitude":122.83783800000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":212.004138,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false,"latitude":-4.4446},"mars":{"sidereal_longitude":71.14213799999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":114.55463800000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":106.716838,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":168.265938,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":350.076838,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":309.6582,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":129.6582,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","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":2026,"month":8,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461272.770833,"kali_year":5128,"ahargana":1872807.2708,"sun":{"sidereal_longitude":122.1378,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":210.6674,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":88.5296,"elapsed_within_tithi_degrees":4.5296},"nakshatra":{"number":16,"name":"Viśākhā","pada":4,"moon_longitude":210.6674,"elapsed_within_degrees":10.6674},"yoga":{"number":25,"name":"Brahma","sum_longitude":332.8052},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.445,"elongation":88.53},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.445,"opposition_distance":91.47}},"eclipse_window_40days":[{"offset_days":8,"type":"lunar","occurs":true,"moon_latitude":-0.114,"opposition_distance":2.035}]},"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":"06:04","sunsetLocal":"18:23","solarNoonLocal":"12:14","dayLengthHours":12.320263413672107,"dayLengthDisplay":"12 Hours 19 Mins 13 Secs","nightLengthDisplay":"11 Hours 40 Mins 47 Secs","moonriseLocal":"12:18","moonsetLocal":"00:03","rahuKala":{"name":"Rāhu Kāla","start":"13:46","end":"15:18","startHours":13.766786441884516,"endHours":15.30681936859353,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"06:04","end":"07:36","startHours":6.06662180833945,"endHours":7.606654735048464,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"09:09","end":"10:41","startHours":9.146687661757477,"endHours":10.686720588466489,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:56","end":"09:21","startHours":8.941349938196275,"endHours":9.35202538531868,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:35","end":"06:55","startHours":6.579966117242455,"endHours":6.908506474940378,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:49","end":"12:38","startHours":11.8160780680531,"endHours":12.637428962297909,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:25","end":"05:15","startHours":4.423920019849836,"endHours":5.245270914094643,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:02","end":"06:04","startHours":5.039933190533441,"endHours":6.06662180833945,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:17","end":"15:06","startHours":14.28013075078752,"endHours":15.101481645032328,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:11","end":"18:35","startHours":18.186885222011558,"endHours":18.586885222011556,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:23","end":"18:54","startHours":18.386885222011557,"endHours":18.90022953091456,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:08","end":"19:53","startHours":18.136885222011557,"endHours":19.886885222011557,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:49","end":"00:38","startHours":23.8160780680531,"endHours":24.637428962297907,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"06:04","end":"07:36","startHours":6.06662180833945,"endHours":7.606654735048464,"quality":"auspicious"},{"name":"Roga","start":"07:36","end":"09:09","startHours":7.606654735048464,"endHours":9.146687661757477,"quality":"inauspicious"},{"name":"Udveg","start":"09:09","end":"10:41","startHours":9.146687661757477,"endHours":10.686720588466489,"quality":"inauspicious"},{"name":"Chala","start":"10:41","end":"12:14","startHours":10.686720588466489,"endHours":12.226753515175503,"quality":"neutral"},{"name":"Labha","start":"12:14","end":"13:46","startHours":12.226753515175503,"endHours":13.766786441884516,"quality":"auspicious"},{"name":"Amṛta","start":"13:46","end":"15:18","startHours":13.766786441884516,"endHours":15.30681936859353,"quality":"auspicious"},{"name":"Kāla","start":"15:18","end":"16:51","startHours":15.30681936859353,"endHours":16.846852295302543,"quality":"inauspicious"},{"name":"Śubha","start":"16:51","end":"18:23","startHours":16.846852295302543,"endHours":18.386885222011557,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:23","end":"19:51","startHours":18.386885222011557,"endHours":19.846852295302543,"quality":"auspicious"},{"name":"Kāla","start":"19:51","end":"21:18","startHours":19.846852295302543,"endHours":21.30681936859353,"quality":"inauspicious"},{"name":"Śubha","start":"21:18","end":"22:46","startHours":21.30681936859353,"endHours":22.766786441884516,"quality":"auspicious"},{"name":"Roga","start":"22:46","end":"00:14","startHours":22.766786441884516,"endHours":24.226753515175503,"quality":"inauspicious"},{"name":"Udveg","start":"00:14","end":"01:41","startHours":24.226753515175503,"endHours":25.68672058846649,"quality":"inauspicious"},{"name":"Chala","start":"01:41","end":"03:09","startHours":25.68672058846649,"endHours":27.146687661757475,"quality":"neutral"},{"name":"Labha","start":"03:09","end":"04:36","startHours":27.146687661757475,"endHours":28.606654735048465,"quality":"auspicious"},{"name":"Amṛta","start":"04:36","end":"06:04","startHours":28.606654735048465,"endHours":30.06662180833945,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:04","end":"07:04","startHours":6.06662180833945,"endHours":7.06662180833945,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"07:04","end":"08:04","startHours":7.06662180833945,"endHours":8.06662180833945,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"08:04","end":"09:04","startHours":8.06662180833945,"endHours":9.06662180833945,"planetary_lord":"Moon"},{"name":"Hora 4","start":"09:04","end":"10:04","startHours":9.06662180833945,"endHours":10.06662180833945,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"10:04","end":"11:04","startHours":10.06662180833945,"endHours":11.06662180833945,"planetary_lord":"Venus"},{"name":"Hora 6","start":"11:04","end":"12:04","startHours":11.06662180833945,"endHours":12.06662180833945,"planetary_lord":"Sun"},{"name":"Hora 7","start":"12:04","end":"13:04","startHours":12.06662180833945,"endHours":13.06662180833945,"planetary_lord":"Mars"},{"name":"Hora 8","start":"13:04","end":"14:04","startHours":13.06662180833945,"endHours":14.06662180833945,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"14:04","end":"15:04","startHours":14.06662180833945,"endHours":15.06662180833945,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"15:04","end":"16:04","startHours":15.06662180833945,"endHours":16.06662180833945,"planetary_lord":"Moon"},{"name":"Hora 11","start":"16:04","end":"17:04","startHours":16.06662180833945,"endHours":17.06662180833945,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"17:04","end":"18:04","startHours":17.06662180833945,"endHours":18.06662180833945,"planetary_lord":"Venus"},{"name":"Hora 13","start":"18:04","end":"19:04","startHours":18.06662180833945,"endHours":19.06662180833945,"planetary_lord":"Sun"},{"name":"Hora 14","start":"19:04","end":"20:04","startHours":19.06662180833945,"endHours":20.06662180833945,"planetary_lord":"Mars"},{"name":"Hora 15","start":"20:04","end":"21:04","startHours":20.06662180833945,"endHours":21.06662180833945,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"21:04","end":"22:04","startHours":21.06662180833945,"endHours":22.06662180833945,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"22:04","end":"23:04","startHours":22.06662180833945,"endHours":23.06662180833945,"planetary_lord":"Moon"},{"name":"Hora 18","start":"23:04","end":"00:04","startHours":23.06662180833945,"endHours":24.06662180833945,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"00:04","end":"01:04","startHours":24.06662180833945,"endHours":25.06662180833945,"planetary_lord":"Venus"},{"name":"Hora 20","start":"01:04","end":"02:04","startHours":25.06662180833945,"endHours":26.06662180833945,"planetary_lord":"Sun"},{"name":"Hora 21","start":"02:04","end":"03:04","startHours":26.06662180833945,"endHours":27.06662180833945,"planetary_lord":"Mars"},{"name":"Hora 22","start":"03:04","end":"04:04","startHours":27.06662180833945,"endHours":28.06662180833945,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"04:04","end":"05:04","startHours":28.06662180833945,"endHours":29.06662180833945,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"05:04","end":"06:04","startHours":29.06662180833945,"endHours":30.06662180833945,"planetary_lord":"Moon"}],"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","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"North-East","rahuVasa":"North-West","anandadiYoga":{"name":"Prajāpati","quality":"Auspicious"},"drikRitu":"Varṣā (Monsoon)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":12.489111739411541,"eotMinutes":-3.0500109105302213,"ayanamsa":24.2251}},"calendars":{"vikram_samvat":2083,"vikram_samvatsara":"Siddhārthī","saka_samvat":1948,"saka_samvatsara":"Parābhava","bengali_samvat":1433,"malayalam_era":1202,"nanakshahi_year":557,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Śukla Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Śukla Aṣṭamī · Vikram 2083 Siddhārthī · Śaka 1948 Parābhava"},"festivals":[{"id":"radhashtami","name":"Rādhāṣṭamī","name_sanskrit":"राधाष्टमी","tradition":"Vaishnava","associated_deity":"Śrī Rādhā (Krishna's hlādinī-śakti)","significance":"Manifestation of Śrī Rādhā at Barsānā — Krishna's ādi-śakti.","vrata":true,"detection":{"tithi_number":8,"tithi_paksha":"Śukla","lunar_month":"Bhādrapada"},"precedence":2,"sources":["Padma Purāṇa","Brahma-Vaivarta Purāṇa"]},{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi":"Siṃha"},"precedence":5}],"todays_walk":{"walk":{"id":"guru-walk","name":"Bṛhaspati Walk","name_sanskrit":"गुरु यात्रा","type":"graha","description":"Wisdom transmission + BG 4.34.","step_count":8,"url":"/walk/guru-walk"},"reason":"Guruvāra (Thursday) — its presiding graha's walk."},"cosmic_resonances":[{"historical_date":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Śukla Aṣṭamī","url":"/day/-3137-12-25","relevance":0.5},{"historical_date":"-0562-04-11","event":"Bhagavān Buddha's birth at Lumbinī","chart_id":"buddha","shared_marker":"same Viśākhā","url":"/day/-0562-04-11","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 August 20, 2026 CE · Colombo, Sri Lanka · Vidhyamitra","description":"August 20, 2026 CE for Colombo, Sri Lanka: Śukla Aṣṭamī, sūryodaya 06:04, sūryāsta 18:23.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/colombo/2026-08-20","hreflang_alternates":{"en":"https://vidhyamitra.com/city/colombo/2026-08-20","sa":"https://sa.vidhyamitra.com/city/colombo/2026-08-20","hi":"https://hi.vidhyamitra.com/city/colombo/2026-08-20","x-default":"https://vidhyamitra.com/city/colombo/2026-08-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T19:31:14.081Z","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":"2026-05-14T19:31:14.081Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T19:31:14.081Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}