{"id":"vidhyamitra:city-day:mathura:1981-06-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mathura/1981-06-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-06-18","date_display":"June 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":6,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444773.770833,"kali_year":5083,"ahargana":1856308.2708,"sun":{"sidereal_longitude":62.9354,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":248.0603,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":16,"name":"Pratipada","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pratipada","elongation_degrees":185.1249,"elapsed_within_tithi_degrees":5.1249},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":248.0603,"elapsed_within_degrees":8.0603},"yoga":{"number":24,"name":"Śukla","sum_longitude":310.9957},"karana":{"half_tithi_index":30,"name":"Bālava"},"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":1981,"month":6,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444773.770833,"ahargana":1856308.2708,"kali_year":5083,"ayanamsa_lahiri":23.594,"grahas":{"sun":{"sidereal_longitude":63.135920999999996,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":247.774221,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false,"latitude":2.6302},"mars":{"sidereal_longitude":45.731221000000005,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":69.440921,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":true},"jupiter":{"sidereal_longitude":157.738021,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"venus":{"sidereal_longitude":82.30062099999998,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":159.28312099999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":103.8546,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":283.8546,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"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":6,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444773.770833,"kali_year":5083,"ahargana":1856308.2708,"sun":{"sidereal_longitude":62.9354,"rashi":3,"rashi_name":"Mithuna"},"moon":{"sidereal_longitude":248.0603,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":16,"name":"Pratipada","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Pratipada","elongation_degrees":185.1249,"elapsed_within_tithi_degrees":5.1249},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":248.0603,"elapsed_within_degrees":8.0603},"yoga":{"number":24,"name":"Śukla","sum_longitude":310.9957},"karana":{"half_tithi_index":30,"name":"Bālava"},"vara":{"number":6,"name":"Guruvāra (Thursday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.63,"elongation":174.875},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.63,"opposition_distance":5.125}},"eclipse_window_40days":[]},"city":{"slug":"mathura","name":"Mathurā","lat":27.4924,"lon":77.6737,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"mathura","name":"Mathurā","lat":27.4924,"lon":77.6737,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"05:24","sunsetLocal":"19:16","solarNoonLocal":"12:20","dayLengthHours":13.87524348632272,"dayLengthDisplay":"13 Hours 52 Mins 31 Secs","nightLengthDisplay":"10 Hours 07 Mins 29 Secs","moonriseLocal":"19:28","moonsetLocal":"05:49","rahuKala":{"name":"Rāhu Kāla","start":"14:04","end":"15:48","startHours":14.06976933023867,"endHours":15.80417476602901,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"05:24","end":"07:08","startHours":5.39774215128697,"endHours":7.132147587077309,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:52","end":"10:36","startHours":8.866553022867649,"endHours":10.60095845865799,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:38","end":"09:06","startHours":8.63529896476227,"endHours":9.097807080973029,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:59","end":"06:21","startHours":5.975877296550417,"endHours":6.345883789519022,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:52","end":"12:48","startHours":11.872855778237572,"endHours":12.797872010659088,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:33","end":"04:28","startHours":3.54770968644394,"endHours":4.472725918865455,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:14","end":"05:24","startHours":4.241471860760076,"endHours":5.39774215128697,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:39","end":"15:34","startHours":14.647904475502116,"endHours":15.57292070792363,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"19:04","end":"19:28","startHours":19.07298563760969,"endHours":19.47298563760969,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:16","end":"19:51","startHours":19.27298563760969,"endHours":19.851120782873135,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"19:01","end":"20:46","startHours":19.02298563760969,"endHours":20.77298563760969,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:52","end":"00:48","startHours":23.87285577823757,"endHours":24.797872010659084,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Śubha","start":"05:24","end":"07:08","startHours":5.39774215128697,"endHours":7.132147587077309,"quality":"auspicious"},{"name":"Roga","start":"07:08","end":"08:52","startHours":7.132147587077309,"endHours":8.866553022867649,"quality":"inauspicious"},{"name":"Udveg","start":"08:52","end":"10:36","startHours":8.866553022867649,"endHours":10.60095845865799,"quality":"inauspicious"},{"name":"Chala","start":"10:36","end":"12:20","startHours":10.60095845865799,"endHours":12.33536389444833,"quality":"neutral"},{"name":"Labha","start":"12:20","end":"14:04","startHours":12.33536389444833,"endHours":14.06976933023867,"quality":"auspicious"},{"name":"Amṛta","start":"14:04","end":"15:48","startHours":14.06976933023867,"endHours":15.80417476602901,"quality":"auspicious"},{"name":"Kāla","start":"15:48","end":"17:32","startHours":15.80417476602901,"endHours":17.53858020181935,"quality":"inauspicious"},{"name":"Śubha","start":"17:32","end":"19:16","startHours":17.53858020181935,"endHours":19.27298563760969,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Amṛta","start":"19:16","end":"20:32","startHours":19.27298563760969,"endHours":20.53858020181935,"quality":"auspicious"},{"name":"Kāla","start":"20:32","end":"21:48","startHours":20.53858020181935,"endHours":21.80417476602901,"quality":"inauspicious"},{"name":"Śubha","start":"21:48","end":"23:04","startHours":21.80417476602901,"endHours":23.06976933023867,"quality":"auspicious"},{"name":"Roga","start":"23:04","end":"00:20","startHours":23.06976933023867,"endHours":24.335363894448328,"quality":"inauspicious"},{"name":"Udveg","start":"00:20","end":"01:36","startHours":24.335363894448328,"endHours":25.600958458657992,"quality":"inauspicious"},{"name":"Chala","start":"01:36","end":"02:52","startHours":25.600958458657992,"endHours":26.86655302286765,"quality":"neutral"},{"name":"Labha","start":"02:52","end":"04:08","startHours":26.86655302286765,"endHours":28.13214758707731,"quality":"auspicious"},{"name":"Amṛta","start":"04:08","end":"05:24","startHours":28.13214758707731,"endHours":29.39774215128697,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:24","end":"06:24","startHours":5.39774215128697,"endHours":6.39774215128697,"planetary_lord":"Jupiter"},{"name":"Hora 2","start":"06:24","end":"07:24","startHours":6.39774215128697,"endHours":7.39774215128697,"planetary_lord":"Saturn"},{"name":"Hora 3","start":"07:24","end":"08:24","startHours":7.39774215128697,"endHours":8.39774215128697,"planetary_lord":"Moon"},{"name":"Hora 4","start":"08:24","end":"09:24","startHours":8.39774215128697,"endHours":9.39774215128697,"planetary_lord":"Mercury"},{"name":"Hora 5","start":"09:24","end":"10:24","startHours":9.39774215128697,"endHours":10.39774215128697,"planetary_lord":"Venus"},{"name":"Hora 6","start":"10:24","end":"11:24","startHours":10.39774215128697,"endHours":11.39774215128697,"planetary_lord":"Sun"},{"name":"Hora 7","start":"11:24","end":"12:24","startHours":11.39774215128697,"endHours":12.39774215128697,"planetary_lord":"Mars"},{"name":"Hora 8","start":"12:24","end":"13:24","startHours":12.39774215128697,"endHours":13.39774215128697,"planetary_lord":"Jupiter"},{"name":"Hora 9","start":"13:24","end":"14:24","startHours":13.39774215128697,"endHours":14.39774215128697,"planetary_lord":"Saturn"},{"name":"Hora 10","start":"14:24","end":"15:24","startHours":14.39774215128697,"endHours":15.39774215128697,"planetary_lord":"Moon"},{"name":"Hora 11","start":"15:24","end":"16:24","startHours":15.39774215128697,"endHours":16.39774215128697,"planetary_lord":"Mercury"},{"name":"Hora 12","start":"16:24","end":"17:24","startHours":16.39774215128697,"endHours":17.39774215128697,"planetary_lord":"Venus"},{"name":"Hora 13","start":"17:24","end":"18:24","startHours":17.39774215128697,"endHours":18.39774215128697,"planetary_lord":"Sun"},{"name":"Hora 14","start":"18:24","end":"19:24","startHours":18.39774215128697,"endHours":19.39774215128697,"planetary_lord":"Mars"},{"name":"Hora 15","start":"19:24","end":"20:24","startHours":19.39774215128697,"endHours":20.39774215128697,"planetary_lord":"Jupiter"},{"name":"Hora 16","start":"20:24","end":"21:24","startHours":20.39774215128697,"endHours":21.39774215128697,"planetary_lord":"Saturn"},{"name":"Hora 17","start":"21:24","end":"22:24","startHours":21.39774215128697,"endHours":22.39774215128697,"planetary_lord":"Moon"},{"name":"Hora 18","start":"22:24","end":"23:24","startHours":22.39774215128697,"endHours":23.39774215128697,"planetary_lord":"Mercury"},{"name":"Hora 19","start":"23:24","end":"00:24","startHours":23.39774215128697,"endHours":24.39774215128697,"planetary_lord":"Venus"},{"name":"Hora 20","start":"00:24","end":"01:24","startHours":24.39774215128697,"endHours":25.39774215128697,"planetary_lord":"Sun"},{"name":"Hora 21","start":"01:24","end":"02:24","startHours":25.39774215128697,"endHours":26.39774215128697,"planetary_lord":"Mars"},{"name":"Hora 22","start":"02:24","end":"03:24","startHours":26.39774215128697,"endHours":27.39774215128697,"planetary_lord":"Jupiter"},{"name":"Hora 23","start":"03:24","end":"04:24","startHours":27.39774215128697,"endHours":28.39774215128697,"planetary_lord":"Saturn"},{"name":"Hora 24","start":"04:24","end":"05:24","startHours":28.39774215128697,"endHours":29.39774215128697,"planetary_lord":"Moon"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"South (Dakṣiṇa)","chandraVasa":"East","rahuVasa":"North-West","anandadiYoga":{"name":"Dhvaja","quality":"Auspicious"},"drikRitu":"Grīṣma (Summer)","vedicRitu":"Grīṣma (Summer)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":23.39606440282373,"eotMinutes":-0.8166336668997627,"ayanamsa":23.594}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Āṣāḍha","lunar_month_paksha_full":"Āṣāḍha Kṛṣṇa Pakṣa","solar_month":"Mithuna (Āni)","ritu":"Grīṣma (Summer)","display_summary":"Āṣāḍha Kṛṣṇa Pratipada · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"mithuna-sankranti","name":"Mithuna Saṅkrānti","name_sanskrit":"मिथुन सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Gemini.","vrata":false,"detection":{"sun_rashi":"Mithuna"},"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":[]},"validity":{"eternal":false,"location_specific":"mathura"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga June 18, 1981 CE · Mathurā · Vidhyamitra","description":"June 18, 1981 CE for Mathurā: Kṛṣṇa Pratipada, sūryodaya 05:24, sūryāsta 19:16.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mathura/1981-06-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mathura/1981-06-18","sa":"https://sa.vidhyamitra.com/city/mathura/1981-06-18","hi":"https://hi.vidhyamitra.com/city/mathura/1981-06-18","x-default":"https://vidhyamitra.com/city/mathura/1981-06-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T12:37:09.073Z","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":"2026-05-14T12:37:09.073Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T12:37:09.073Z","pillar_versions":{"BOB-History":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}