{"id":"vidhyamitra:city-day:kolhapur:1981-04-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/kolhapur/1981-04-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-04-18","date_display":"April 18, 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":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444712.770833,"kali_year":5083,"ahargana":1856247.2708,"sun":{"sidereal_longitude":4.498,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":170.6426,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":166.1446,"elapsed_within_tithi_degrees":10.1446},"nakshatra":{"number":13,"name":"Hasta","pada":4,"moon_longitude":170.6426,"elapsed_within_degrees":10.6426},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":175.1407},"karana":{"half_tithi_index":27,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444712.770833,"ahargana":1856247.2708,"kali_year":5083,"ayanamsa_lahiri":23.5917,"grahas":{"sun":{"sidereal_longitude":4.33675199999999,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":170.18495200000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":4},"retrograde":false,"latitude":4.0283},"mars":{"sidereal_longitude":1.1870519999999942,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":354.070152,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":159.24335199999996,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":7.363051999999982,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":160.98885199999995,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":107.0867,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":287.0867,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":4,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444712.770833,"kali_year":5083,"ahargana":1856247.2708,"sun":{"sidereal_longitude":4.498,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":170.6426,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":14,"name":"Caturdaśī","paksha":"Śukla","full_name":"Śukla Caturdaśī","elongation_degrees":166.1446,"elapsed_within_tithi_degrees":10.1446},"nakshatra":{"number":13,"name":"Hasta","pada":4,"moon_longitude":170.6426,"elapsed_within_degrees":10.6426},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":175.1407},"karana":{"half_tithi_index":27,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.028,"elongation":166.145},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.028,"opposition_distance":13.855}},"eclipse_window_40days":[]},"city":{"slug":"kolhapur","name":"Kolhāpur, Maharashtra","lat":16.705,"lon":74.2433,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"kolhapur","name":"Kolhāpur, Maharashtra","lat":16.705,"lon":74.2433,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"sunriseLocal":"06:16","sunsetLocal":"18:49","solarNoonLocal":"12:33","dayLengthHours":12.553205329471549,"dayLengthDisplay":"12 Hours 33 Mins 12 Secs","nightLengthDisplay":"11 Hours 26 Mins 48 Secs","moonriseLocal":"17:40","moonsetLocal":"05:32","rahuKala":{"name":"Rāhu Kāla","start":"09:24","end":"10:58","startHours":9.403713952700723,"endHours":10.972864618884666,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:07","end":"15:41","startHours":14.111165951252554,"endHours":15.680316617436496,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"06:16","end":"07:50","startHours":6.265412620332835,"endHours":7.834563286516779,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:12","end":"09:37","startHours":9.194493863876197,"endHours":9.612934041525248,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:47","end":"07:07","startHours":6.78846284239415,"endHours":7.123214984513392,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:07","end":"12:58","startHours":12.123575107419558,"endHours":12.960455462717661,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:35","end":"05:26","startHours":4.591651909736629,"endHours":5.4285322650347325,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:13","end":"06:16","startHours":5.219312176210206,"endHours":6.265412620332835,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:38","end":"15:28","startHours":14.634216173313867,"endHours":15.47109652861197,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:37","end":"19:01","startHours":18.618617949804385,"endHours":19.018617949804383,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:49","end":"19:21","startHours":18.818617949804384,"endHours":19.3416681718657,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:34","end":"20:19","startHours":18.568617949804384,"endHours":20.318617949804384,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:07","end":"00:58","startHours":24.123575107419555,"endHours":24.96045546271766,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"06:16","end":"07:50","startHours":6.265412620332835,"endHours":7.834563286516779,"quality":"inauspicious"},{"name":"Śubha","start":"07:50","end":"09:24","startHours":7.834563286516779,"endHours":9.403713952700723,"quality":"auspicious"},{"name":"Roga","start":"09:24","end":"10:58","startHours":9.403713952700723,"endHours":10.972864618884666,"quality":"inauspicious"},{"name":"Udveg","start":"10:58","end":"12:33","startHours":10.972864618884666,"endHours":12.54201528506861,"quality":"inauspicious"},{"name":"Chala","start":"12:33","end":"14:07","startHours":12.54201528506861,"endHours":14.111165951252554,"quality":"neutral"},{"name":"Labha","start":"14:07","end":"15:41","startHours":14.111165951252554,"endHours":15.680316617436496,"quality":"auspicious"},{"name":"Amṛta","start":"15:41","end":"17:15","startHours":15.680316617436496,"endHours":17.24946728362044,"quality":"auspicious"},{"name":"Kāla","start":"17:15","end":"18:49","startHours":17.24946728362044,"endHours":18.818617949804384,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:49","end":"20:15","startHours":18.818617949804384,"endHours":20.24946728362044,"quality":"auspicious"},{"name":"Amṛta","start":"20:15","end":"21:41","startHours":20.24946728362044,"endHours":21.680316617436496,"quality":"auspicious"},{"name":"Kāla","start":"21:41","end":"23:07","startHours":21.680316617436496,"endHours":23.111165951252552,"quality":"inauspicious"},{"name":"Śubha","start":"23:07","end":"00:33","startHours":23.111165951252552,"endHours":24.542015285068608,"quality":"auspicious"},{"name":"Roga","start":"00:33","end":"01:58","startHours":24.542015285068608,"endHours":25.972864618884664,"quality":"inauspicious"},{"name":"Udveg","start":"01:58","end":"03:24","startHours":25.972864618884664,"endHours":27.403713952700723,"quality":"inauspicious"},{"name":"Chala","start":"03:24","end":"04:50","startHours":27.403713952700723,"endHours":28.83456328651678,"quality":"neutral"},{"name":"Labha","start":"04:50","end":"06:16","startHours":28.83456328651678,"endHours":30.265412620332835,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:16","end":"07:16","startHours":6.265412620332835,"endHours":7.265412620332835,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"07:16","end":"08:16","startHours":7.265412620332835,"endHours":8.265412620332835,"planetary_lord":"Moon"},{"name":"Hora 3","start":"08:16","end":"09:16","startHours":8.265412620332835,"endHours":9.265412620332835,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"09:16","end":"10:16","startHours":9.265412620332835,"endHours":10.265412620332835,"planetary_lord":"Venus"},{"name":"Hora 5","start":"10:16","end":"11:16","startHours":10.265412620332835,"endHours":11.265412620332835,"planetary_lord":"Sun"},{"name":"Hora 6","start":"11:16","end":"12:16","startHours":11.265412620332835,"endHours":12.265412620332835,"planetary_lord":"Mars"},{"name":"Hora 7","start":"12:16","end":"13:16","startHours":12.265412620332835,"endHours":13.265412620332835,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"13:16","end":"14:16","startHours":13.265412620332835,"endHours":14.265412620332835,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"14:16","end":"15:16","startHours":14.265412620332835,"endHours":15.265412620332835,"planetary_lord":"Moon"},{"name":"Hora 10","start":"15:16","end":"16:16","startHours":15.265412620332835,"endHours":16.265412620332835,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"16:16","end":"17:16","startHours":16.265412620332835,"endHours":17.265412620332835,"planetary_lord":"Venus"},{"name":"Hora 12","start":"17:16","end":"18:16","startHours":17.265412620332835,"endHours":18.265412620332835,"planetary_lord":"Sun"},{"name":"Hora 13","start":"18:16","end":"19:16","startHours":18.265412620332835,"endHours":19.265412620332835,"planetary_lord":"Mars"},{"name":"Hora 14","start":"19:16","end":"20:16","startHours":19.265412620332835,"endHours":20.265412620332835,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"20:16","end":"21:16","startHours":20.265412620332835,"endHours":21.265412620332835,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"21:16","end":"22:16","startHours":21.265412620332835,"endHours":22.265412620332835,"planetary_lord":"Moon"},{"name":"Hora 17","start":"22:16","end":"23:16","startHours":22.265412620332835,"endHours":23.265412620332835,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"23:16","end":"00:16","startHours":23.265412620332835,"endHours":24.265412620332835,"planetary_lord":"Venus"},{"name":"Hora 19","start":"00:16","end":"01:16","startHours":24.265412620332835,"endHours":25.265412620332835,"planetary_lord":"Sun"},{"name":"Hora 20","start":"01:16","end":"02:16","startHours":25.265412620332835,"endHours":26.265412620332835,"planetary_lord":"Mars"},{"name":"Hora 21","start":"02:16","end":"03:16","startHours":26.265412620332835,"endHours":27.265412620332835,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"03:16","end":"04:16","startHours":27.265412620332835,"endHours":28.265412620332835,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"04:16","end":"05:16","startHours":28.265412620332835,"endHours":29.265412620332835,"planetary_lord":"Moon"},{"name":"Hora 24","start":"05:16","end":"06:16","startHours":29.265412620332835,"endHours":30.265412620332835,"planetary_lord":"Mercury"}],"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","Kanyā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Tulā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"North-West","rahuVasa":"East","anandadiYoga":{"name":"Vajra","quality":"Inauspicious"},"drikRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":10.736083426606916,"eotMinutes":0.5058828958834352,"ayanamsa":23.5917}},"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 Śukla Pakṣa","solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Śukla Caturdaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"narasimha-jayanti","name":"Narasiṁha Jayantī","name_sanskrit":"नरसिंह जयन्ती","tradition":"Vaishnava","associated_deity":"Narasiṁha (avatar of Krishna)","deity_avatara_index":14,"significance":"Bhagavān Narasiṁha manifested to protect the bhakta Prahlāda. Krishna's fierce protective form.","vrata":true,"primary_observance":"Sandhyā (twilight) abhiṣekam; recitation of Narasiṁha-Stotra","detection":{"tithi_number":14,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":1,"related_chart":"narasimha","sources":["Bhāgavata Purāṇa 7.8"]},{"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":"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":"Meṣa"},"precedence":2},{"id":"chhinnamasta-jayanti","name":"Chhinnamastā Jayantī","name_sanskrit":"छिन्नमस्ता जयन्ती","tradition":"Shakta","associated_deity":"Devī Chhinnamastā (6th of 10 Mahāvidyās)","significance":"The 6th of the Daśa Mahāvidyās. Devī's self-decapitation form representing transcendence of ego.","vrata":false,"detection":{"tithi_number":14,"tithi_paksha":"Śukla","lunar_month":"Vaiśākha"},"precedence":5}],"todays_walk":{"walk":{"id":"narasimha-jayanti-walk","name":"Narasiṁha Jayantī Walk","name_sanskrit":"नरसिंह जयन्ती यात्रा","type":"festival","description":"Bhāgavata 7.8 (Prahlāda-Narasiṁha) + protective verses.","step_count":9,"url":"/walk/narasimha-jayanti-walk"},"reason":"Today is Narasiṁha Jayantī — its dedicated walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"kolhapur"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 18, 1981 CE · Kolhāpur, Maharashtra · Vidhyamitra","description":"April 18, 1981 CE for Kolhāpur, Maharashtra: Śukla Caturdaśī, sūryodaya 06:16, sūryāsta 18:49.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/kolhapur/1981-04-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/kolhapur/1981-04-18","sa":"https://sa.vidhyamitra.com/city/kolhapur/1981-04-18","hi":"https://hi.vidhyamitra.com/city/kolhapur/1981-04-18","x-default":"https://vidhyamitra.com/city/kolhapur/1981-04-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T08:34:23.780Z","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":"2026-05-18T08:34:23.780Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T08:34:23.780Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}