{"id":"vidhyamitra:city-day:kozhikode:1981-01-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/kozhikode/1981-01-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-01-13","date_display":"January 13, 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":1,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444617.770833,"kali_year":5082,"ahargana":1856152.2708,"sun":{"sidereal_longitude":269.1023,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":354.5831,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":85.4807,"elapsed_within_tithi_degrees":1.4807},"nakshatra":{"number":27,"name":"Revatī","pada":3,"moon_longitude":354.5831,"elapsed_within_degrees":7.9164},"yoga":{"number":20,"name":"Śiva","sum_longitude":263.6854},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"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":1,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444617.770833,"ahargana":1856152.2708,"kali_year":5082,"ayanamsa_lahiri":23.5881,"grahas":{"sun":{"sidereal_longitude":269.18438100000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"moon":{"sidereal_longitude":354.117681,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false,"latitude":-3.9893},"mars":{"sidereal_longitude":287.036781,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":277.37348099999997,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":166.62898100000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"venus":{"sidereal_longitude":248.882381,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":165.93158100000005,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":112.1203,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":292.1203,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"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":1,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444617.770833,"kali_year":5082,"ahargana":1856152.2708,"sun":{"sidereal_longitude":269.1023,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":354.5831,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":85.4807,"elapsed_within_tithi_degrees":1.4807},"nakshatra":{"number":27,"name":"Revatī","pada":3,"moon_longitude":354.5831,"elapsed_within_degrees":7.9164},"yoga":{"number":20,"name":"Śiva","sum_longitude":263.6854},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":4,"name":"Maṅgalavāra (Tuesday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.989,"elongation":85.481},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.989,"opposition_distance":94.519}},"eclipse_window_40days":[{"offset_days":7,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776}]},"city":{"slug":"kozhikode","name":"Kozhikode (Calicut), Kerala","lat":11.2588,"lon":75.7804,"tz_offset_hours":5.5,"state":"Kerala","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"kozhikode","name":"Kozhikode (Calicut), Kerala","lat":11.2588,"lon":75.7804,"tz_offset_hours":5.5,"state":"Kerala","country":"IN","tier":"tier-1"},"sunriseLocal":"06:50","sunsetLocal":"18:21","solarNoonLocal":"12:36","dayLengthHours":11.521922444091501,"dayLengthDisplay":"11 Hours 31 Mins 19 Secs","nightLengthDisplay":"12 Hours 28 Mins 41 Secs","moonriseLocal":"12:07","moonsetLocal":"00:23","rahuKala":{"name":"Rāhu Kāla","start":"15:28","end":"16:55","startHours":15.472386135879102,"endHours":16.91262644139054,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"09:43","end":"11:09","startHours":9.711424913833351,"endHours":11.151665219344789,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"12:36","end":"14:02","startHours":12.591905524856227,"endHours":14.032145830367664,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:31","end":"09:54","startHours":9.519392873098493,"endHours":9.90345695456821,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:19","end":"07:37","startHours":7.311024404647621,"endHours":7.618275669823395,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:12","end":"12:59","startHours":12.20784144338651,"endHours":12.975969606325943,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:18","end":"06:04","startHours":5.294687976931608,"endHours":6.062816139871042,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:52","end":"06:50","startHours":5.870784099136183,"endHours":6.830944302810475,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:31","end":"15:17","startHours":14.51222593220481,"endHours":15.280354095144244,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:09","end":"18:33","startHours":18.152866746901978,"endHours":18.552866746901977,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:21","end":"18:50","startHours":18.352866746901977,"endHours":18.832946848739123,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:06","end":"19:51","startHours":18.102866746901977,"endHours":19.852866746901977,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:12","end":"00:59","startHours":24.20784144338651,"endHours":24.975969606325943,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Roga","start":"06:50","end":"08:16","startHours":6.830944302810475,"endHours":8.271184608321914,"quality":"inauspicious"},{"name":"Udveg","start":"08:16","end":"09:43","startHours":8.271184608321914,"endHours":9.711424913833351,"quality":"inauspicious"},{"name":"Chala","start":"09:43","end":"11:09","startHours":9.711424913833351,"endHours":11.151665219344789,"quality":"neutral"},{"name":"Labha","start":"11:09","end":"12:36","startHours":11.151665219344789,"endHours":12.591905524856227,"quality":"auspicious"},{"name":"Amṛta","start":"12:36","end":"14:02","startHours":12.591905524856227,"endHours":14.032145830367664,"quality":"auspicious"},{"name":"Kāla","start":"14:02","end":"15:28","startHours":14.032145830367664,"endHours":15.472386135879102,"quality":"inauspicious"},{"name":"Śubha","start":"15:28","end":"16:55","startHours":15.472386135879102,"endHours":16.91262644139054,"quality":"auspicious"},{"name":"Roga","start":"16:55","end":"18:21","startHours":16.91262644139054,"endHours":18.352866746901977,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Kāla","start":"18:21","end":"19:55","startHours":18.352866746901977,"endHours":19.91262644139054,"quality":"inauspicious"},{"name":"Śubha","start":"19:55","end":"21:28","startHours":19.91262644139054,"endHours":21.472386135879102,"quality":"auspicious"},{"name":"Roga","start":"21:28","end":"23:02","startHours":21.472386135879102,"endHours":23.032145830367664,"quality":"inauspicious"},{"name":"Udveg","start":"23:02","end":"00:36","startHours":23.032145830367664,"endHours":24.591905524856227,"quality":"inauspicious"},{"name":"Chala","start":"00:36","end":"02:09","startHours":24.591905524856227,"endHours":26.15166521934479,"quality":"neutral"},{"name":"Labha","start":"02:09","end":"03:43","startHours":26.15166521934479,"endHours":27.71142491383335,"quality":"auspicious"},{"name":"Amṛta","start":"03:43","end":"05:16","startHours":27.71142491383335,"endHours":29.271184608321914,"quality":"auspicious"},{"name":"Kāla","start":"05:16","end":"06:50","startHours":29.271184608321914,"endHours":30.830944302810476,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"06:50","end":"07:50","startHours":6.830944302810475,"endHours":7.830944302810475,"planetary_lord":"Mars"},{"name":"Hora 2","start":"07:50","end":"08:50","startHours":7.830944302810475,"endHours":8.830944302810476,"planetary_lord":"Jupiter"},{"name":"Hora 3","start":"08:50","end":"09:50","startHours":8.830944302810476,"endHours":9.830944302810476,"planetary_lord":"Saturn"},{"name":"Hora 4","start":"09:50","end":"10:50","startHours":9.830944302810476,"endHours":10.830944302810476,"planetary_lord":"Moon"},{"name":"Hora 5","start":"10:50","end":"11:50","startHours":10.830944302810476,"endHours":11.830944302810476,"planetary_lord":"Mercury"},{"name":"Hora 6","start":"11:50","end":"12:50","startHours":11.830944302810476,"endHours":12.830944302810476,"planetary_lord":"Venus"},{"name":"Hora 7","start":"12:50","end":"13:50","startHours":12.830944302810476,"endHours":13.830944302810476,"planetary_lord":"Sun"},{"name":"Hora 8","start":"13:50","end":"14:50","startHours":13.830944302810476,"endHours":14.830944302810476,"planetary_lord":"Mars"},{"name":"Hora 9","start":"14:50","end":"15:50","startHours":14.830944302810476,"endHours":15.830944302810476,"planetary_lord":"Jupiter"},{"name":"Hora 10","start":"15:50","end":"16:50","startHours":15.830944302810476,"endHours":16.830944302810476,"planetary_lord":"Saturn"},{"name":"Hora 11","start":"16:50","end":"17:50","startHours":16.830944302810476,"endHours":17.830944302810476,"planetary_lord":"Moon"},{"name":"Hora 12","start":"17:50","end":"18:50","startHours":17.830944302810476,"endHours":18.830944302810476,"planetary_lord":"Mercury"},{"name":"Hora 13","start":"18:50","end":"19:50","startHours":18.830944302810476,"endHours":19.830944302810476,"planetary_lord":"Venus"},{"name":"Hora 14","start":"19:50","end":"20:50","startHours":19.830944302810476,"endHours":20.830944302810476,"planetary_lord":"Sun"},{"name":"Hora 15","start":"20:50","end":"21:50","startHours":20.830944302810476,"endHours":21.830944302810476,"planetary_lord":"Mars"},{"name":"Hora 16","start":"21:50","end":"22:50","startHours":21.830944302810476,"endHours":22.830944302810476,"planetary_lord":"Jupiter"},{"name":"Hora 17","start":"22:50","end":"23:50","startHours":22.830944302810476,"endHours":23.830944302810476,"planetary_lord":"Saturn"},{"name":"Hora 18","start":"23:50","end":"00:50","startHours":23.830944302810476,"endHours":24.830944302810476,"planetary_lord":"Moon"},{"name":"Hora 19","start":"00:50","end":"01:50","startHours":24.830944302810476,"endHours":25.830944302810476,"planetary_lord":"Mercury"},{"name":"Hora 20","start":"01:50","end":"02:50","startHours":25.830944302810476,"endHours":26.830944302810476,"planetary_lord":"Venus"},{"name":"Hora 21","start":"02:50","end":"03:50","startHours":26.830944302810476,"endHours":27.830944302810476,"planetary_lord":"Sun"},{"name":"Hora 22","start":"03:50","end":"04:50","startHours":27.830944302810476,"endHours":28.830944302810476,"planetary_lord":"Mars"},{"name":"Hora 23","start":"04:50","end":"05:50","startHours":28.830944302810476,"endHours":29.830944302810476,"planetary_lord":"Jupiter"},{"name":"Hora 24","start":"05:50","end":"06:50","startHours":29.830944302810476,"endHours":30.830944302810476,"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":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"North (Uttara)","chandraVasa":"South-West","rahuVasa":"North","anandadiYoga":{"name":"Dhvaja","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-21.51402002668385,"eotMinutes":-8.635931491373626,"ayanamsa":23.5881}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Aṣṭamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"lohri","name":"Lohri","name_sanskrit":"लोहड़ी","tradition":"Regional","significance":"Punjab harvest festival; eve of Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi_eve_of_ingress":"Makara"},"precedence":4}],"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":[{"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}]},"validity":{"eternal":false,"location_specific":"kozhikode"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga January 13, 1981 CE · Kozhikode (Calicut), Kerala · Vidhyamitra","description":"January 13, 1981 CE for Kozhikode (Calicut), Kerala: Śukla Aṣṭamī, sūryodaya 06:50, sūryāsta 18:21.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/kozhikode/1981-01-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/kozhikode/1981-01-13","sa":"https://sa.vidhyamitra.com/city/kozhikode/1981-01-13","hi":"https://hi.vidhyamitra.com/city/kozhikode/1981-01-13","x-default":"https://vidhyamitra.com/city/kozhikode/1981-01-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T22:41:19.699Z","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":"2026-06-01T22:41:19.699Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-01T22:41:19.699Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}