{"id":"vidhyamitra:city-day:colombo:2015-10-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/colombo/2015-10-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2015-10-01","date_display":"October 1, 2015 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":2015,"month":10,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457296.770833,"kali_year":5117,"ahargana":1868831.2708,"sun":{"sidereal_longitude":162.6982,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":21.7229,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":219.0247,"elapsed_within_tithi_degrees":3.0247},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3,"moon_longitude":21.7229,"elapsed_within_degrees":8.3895},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":184.421},"karana":{"half_tithi_index":36,"name":"Bava"},"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":2015,"month":10,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2457296.770833,"ahargana":1868831.2708,"kali_year":5117,"ayanamsa_lahiri":24.073,"grahas":{"sun":{"sidereal_longitude":163.48135000000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"moon":{"sidereal_longitude":24.460050000000024,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false,"latitude":-2.974},"mars":{"sidereal_longitude":129.45495,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":162.55684999999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":136.03205000000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"venus":{"sidereal_longitude":119.79005000000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":216.71294999999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":160.3258,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":340.3258,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara 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":2015,"month":10,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2457296.770833,"kali_year":5117,"ahargana":1868831.2708,"sun":{"sidereal_longitude":162.6982,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":21.7229,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":219.0247,"elapsed_within_tithi_degrees":3.0247},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3,"moon_longitude":21.7229,"elapsed_within_degrees":8.3895},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":184.421},"karana":{"half_tithi_index":36,"name":"Bava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.974,"elongation":140.975},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.974,"opposition_distance":39.025}},"eclipse_window_40days":[{"offset_days":-18,"type":"solar","occurs":true,"moon_latitude":-1.372,"elongation":1.608},{"offset_days":-3,"type":"lunar","occurs":true,"moon_latitude":0.154,"opposition_distance":1.236},{"offset_days":12,"type":"solar","occurs":true,"moon_latitude":1.25,"elongation":1.29}]},"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":"05:57","sunsetLocal":"18:01","solarNoonLocal":"11:59","dayLengthHours":12.063435856034253,"dayLengthDisplay":"12 Hours 03 Mins 48 Secs","nightLengthDisplay":"11 Hours 56 Mins 12 Secs","moonriseLocal":"20:32","moonsetLocal":"08:54","rahuKala":{"name":"Rāhu Kāla","start":"13:30","end":"15:00","startHours":13.497720078894542,"endHours":15.005649560898823,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"05:57","end":"07:28","startHours":5.9580726688731325,"endHours":7.466002150877414,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:58","end":"10:29","startHours":8.973931632881696,"endHours":10.481861114885977,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:46","end":"09:10","startHours":8.772874368614458,"endHours":9.174988897148934,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:28","end":"06:47","startHours":6.460715829541226,"endHours":6.7824074523688065,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:35","end":"12:24","startHours":11.587676068355783,"endHours":12.391905125424735,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:21","end":"05:09","startHours":4.349614554735232,"endHours":5.153843611804183,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:57","end":"05:57","startHours":4.952786347536945,"endHours":5.9580726688731325,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:00","end":"14:48","startHours":14.000363239562635,"endHours":14.804592296631585,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:49","end":"18:13","startHours":17.821508524907387,"endHours":18.221508524907385,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:01","end":"18:31","startHours":18.021508524907386,"endHours":18.52415168557548,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:46","end":"19:31","startHours":17.771508524907386,"endHours":19.521508524907386,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:35","end":"00:24","startHours":23.587676068355783,"endHours":24.391905125424735,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"05:57","end":"07:28","startHours":5.9580726688731325,"endHours":7.466002150877414,"quality":"auspicious"},{"name":"Roga","start":"07:28","end":"08:58","startHours":7.466002150877414,"endHours":8.973931632881696,"quality":"inauspicious"},{"name":"Udveg","start":"08:58","end":"10:29","startHours":8.973931632881696,"endHours":10.481861114885977,"quality":"inauspicious"},{"name":"Chala","start":"10:29","end":"11:59","startHours":10.481861114885977,"endHours":11.98979059689026,"quality":"neutral"},{"name":"Labha","start":"11:59","end":"13:30","startHours":11.98979059689026,"endHours":13.497720078894542,"quality":"auspicious"},{"name":"Amṛta","start":"13:30","end":"15:00","startHours":13.497720078894542,"endHours":15.005649560898823,"quality":"auspicious"},{"name":"Kāla","start":"15:00","end":"16:31","startHours":15.005649560898823,"endHours":16.513579042903103,"quality":"inauspicious"},{"name":"Śubha","start":"16:31","end":"18:01","startHours":16.513579042903103,"endHours":18.021508524907386,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"18:01","end":"19:31","startHours":18.021508524907386,"endHours":19.513579042903103,"quality":"auspicious"},{"name":"Kāla","start":"19:31","end":"21:00","startHours":19.513579042903103,"endHours":21.005649560898824,"quality":"inauspicious"},{"name":"Śubha","start":"21:00","end":"22:30","startHours":21.005649560898824,"endHours":22.49772007889454,"quality":"auspicious"},{"name":"Roga","start":"22:30","end":"23:59","startHours":22.49772007889454,"endHours":23.98979059689026,"quality":"inauspicious"},{"name":"Udveg","start":"23:59","end":"01:29","startHours":23.98979059689026,"endHours":25.481861114885977,"quality":"inauspicious"},{"name":"Chala","start":"01:29","end":"02:58","startHours":25.481861114885977,"endHours":26.973931632881694,"quality":"neutral"},{"name":"Labha","start":"02:58","end":"04:28","startHours":26.973931632881694,"endHours":28.466002150877415,"quality":"auspicious"},{"name":"Amṛta","start":"04:28","end":"05:57","startHours":28.466002150877415,"endHours":29.958072668873132,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:57","end":"06:57","startHours":5.9580726688731325,"endHours":6.9580726688731325,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"06:57","end":"07:57","startHours":6.9580726688731325,"endHours":7.9580726688731325,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"07:57","end":"08:57","startHours":7.9580726688731325,"endHours":8.958072668873132,"planetary_lord":"Moon"},{"name":"Hora 4","start":"08:57","end":"09:57","startHours":8.958072668873132,"endHours":9.958072668873132,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"09:57","end":"10:57","startHours":9.958072668873132,"endHours":10.958072668873132,"planetary_lord":"Venus"},{"name":"Hora 6","start":"10:57","end":"11:57","startHours":10.958072668873132,"endHours":11.958072668873132,"planetary_lord":"Sun"},{"name":"Hora 7","start":"11:57","end":"12:57","startHours":11.958072668873132,"endHours":12.958072668873132,"planetary_lord":"Mars"},{"name":"Hora 8","start":"12:57","end":"13:57","startHours":12.958072668873132,"endHours":13.958072668873132,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"13:57","end":"14:57","startHours":13.958072668873132,"endHours":14.958072668873132,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"14:57","end":"15:57","startHours":14.958072668873132,"endHours":15.958072668873132,"planetary_lord":"Moon"},{"name":"Hora 11","start":"15:57","end":"16:57","startHours":15.958072668873132,"endHours":16.958072668873132,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"16:57","end":"17:57","startHours":16.958072668873132,"endHours":17.958072668873132,"planetary_lord":"Venus"},{"name":"Hora 13","start":"17:57","end":"18:57","startHours":17.958072668873132,"endHours":18.958072668873132,"planetary_lord":"Sun"},{"name":"Hora 14","start":"18:57","end":"19:57","startHours":18.958072668873132,"endHours":19.958072668873132,"planetary_lord":"Mars"},{"name":"Hora 15","start":"19:57","end":"20:57","startHours":19.958072668873132,"endHours":20.958072668873132,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"20:57","end":"21:57","startHours":20.958072668873132,"endHours":21.958072668873132,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"21:57","end":"22:57","startHours":21.958072668873132,"endHours":22.958072668873132,"planetary_lord":"Moon"},{"name":"Hora 18","start":"22:57","end":"23:57","startHours":22.958072668873132,"endHours":23.958072668873132,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"23:57","end":"00:57","startHours":23.958072668873132,"endHours":24.958072668873132,"planetary_lord":"Venus"},{"name":"Hora 20","start":"00:57","end":"01:57","startHours":24.958072668873132,"endHours":25.958072668873132,"planetary_lord":"Sun"},{"name":"Hora 21","start":"01:57","end":"02:57","startHours":25.958072668873132,"endHours":26.958072668873132,"planetary_lord":"Mars"},{"name":"Hora 22","start":"02:57","end":"03:57","startHours":26.958072668873132,"endHours":27.958072668873132,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"03:57","end":"04:57","startHours":27.958072668873132,"endHours":28.958072668873132,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"04:57","end":"05:57","startHours":28.958072668873132,"endHours":29.958072668873132,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"East","rahuVasa":"North-West","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"tropicalRitu":"Śarad (Autumn) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-2.9972793049822197,"eotMinutes":11.167764186584405,"ayanamsa":24.073}},"calendars":{"vikram_samvat":2072,"vikram_samvatsara":"Kīlaka","saka_samvat":1937,"saka_samvatsara":"Manmatha","bengali_samvat":1422,"malayalam_era":1191,"nanakshahi_year":546,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Bhādrapada","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kanyā (Puraṭṭāsi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Kṛṣṇa Caturthī · Vikram 2072 Kīlaka · Śaka 1937 Manmatha"},"festivals":[{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"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":[]},"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 1, 2015 CE · Colombo, Sri Lanka · Vidhyamitra","description":"October 1, 2015 CE for Colombo, Sri Lanka: Kṛṣṇa Caturthī, sūryodaya 05:57, sūryāsta 18:01.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/colombo/2015-10-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/colombo/2015-10-01","sa":"https://sa.vidhyamitra.com/city/colombo/2015-10-01","hi":"https://hi.vidhyamitra.com/city/colombo/2015-10-01","x-default":"https://vidhyamitra.com/city/colombo/2015-10-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T05:06:39.560Z","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":"2026-06-01T05:06:39.560Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T05:06:39.560Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}