{"id":"vidhyamitra:city-day:mathura:1981-01-30:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mathura/1981-01-30","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-01-30","date_display":"January 30, 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":30,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444634.770833,"kali_year":5082,"ahargana":1856169.2708,"sun":{"sidereal_longitude":286.5288,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":217.0104,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":25,"name":"Daśamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Daśamī","elongation_degrees":290.4816,"elapsed_within_tithi_degrees":2.4816},"nakshatra":{"number":17,"name":"Anurādhā","pada":2,"moon_longitude":217.0104,"elapsed_within_degrees":3.6771},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":143.5392},"karana":{"half_tithi_index":48,"name":"Vaṇija"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":30,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444634.770833,"ahargana":1856169.2708,"kali_year":5082,"ayanamsa_lahiri":23.5887,"grahas":{"sun":{"sidereal_longitude":286.478832,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"moon":{"sidereal_longitude":216.75533199999995,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false,"latitude":4.3298},"mars":{"sidereal_longitude":300.45883200000003,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":304.61593200000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":166.809932,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":3},"retrograde":true},"venus":{"sidereal_longitude":270.166832,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":165.85333200000002,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":111.2195,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":291.2195,"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":30,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444634.770833,"kali_year":5082,"ahargana":1856169.2708,"sun":{"sidereal_longitude":286.5288,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":217.0104,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":25,"name":"Daśamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Daśamī","elongation_degrees":290.4816,"elapsed_within_tithi_degrees":2.4816},"nakshatra":{"number":17,"name":"Anurādhā","pada":2,"moon_longitude":217.0104,"elapsed_within_degrees":3.6771},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":143.5392},"karana":{"half_tithi_index":48,"name":"Vaṇija"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.33,"elongation":69.518},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.33,"opposition_distance":110.482}},"eclipse_window_40days":[{"offset_days":-10,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776},{"offset_days":6,"type":"solar","occurs":true,"moon_latitude":-0.15,"elongation":0.162}]},"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":"07:07","sunsetLocal":"17:58","solarNoonLocal":"12:33","dayLengthHours":10.856824274042166,"dayLengthDisplay":"10 Hours 51 Mins 25 Secs","nightLengthDisplay":"13 Hours 08 Mins 35 Secs","moonriseLocal":"02:35","moonsetLocal":"13:12","rahuKala":{"name":"Rāhu Kāla","start":"11:11","end":"12:33","startHours":11.187269398674136,"endHours":12.544372432929407,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"15:16","end":"16:37","startHours":15.258578501439949,"endHours":16.61568153569522,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"08:28","end":"09:50","startHours":8.473063330163596,"endHours":9.830166364418867,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:39","end":"10:01","startHours":9.64921929318483,"endHours":10.011113435652902,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:34","end":"07:51","startHours":7.568327973993415,"endHours":7.857843287967873,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:11","end":"12:54","startHours":12.182478290461336,"endHours":12.906266575397481,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:40","end":"06:24","startHours":5.668383726036036,"endHours":6.39217201097218,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:13","end":"07:07","startHours":6.211224939738145,"endHours":7.115960295908325,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:21","end":"15:05","startHours":14.353843145269769,"endHours":15.077631430205914,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:46","end":"18:10","startHours":17.772784569950492,"endHours":18.17278456995049,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:58","end":"18:26","startHours":17.97278456995049,"endHours":18.42515224803558,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:43","end":"19:28","startHours":17.72278456995049,"endHours":19.47278456995049,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:11","end":"00:54","startHours":24.182478290461336,"endHours":24.906266575397478,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Chala","start":"07:07","end":"08:28","startHours":7.115960295908325,"endHours":8.473063330163596,"quality":"neutral"},{"name":"Labha","start":"08:28","end":"09:50","startHours":8.473063330163596,"endHours":9.830166364418867,"quality":"auspicious"},{"name":"Amṛta","start":"09:50","end":"11:11","startHours":9.830166364418867,"endHours":11.187269398674136,"quality":"auspicious"},{"name":"Kāla","start":"11:11","end":"12:33","startHours":11.187269398674136,"endHours":12.544372432929407,"quality":"inauspicious"},{"name":"Śubha","start":"12:33","end":"13:54","startHours":12.544372432929407,"endHours":13.901475467184678,"quality":"auspicious"},{"name":"Roga","start":"13:54","end":"15:16","startHours":13.901475467184678,"endHours":15.258578501439949,"quality":"inauspicious"},{"name":"Udveg","start":"15:16","end":"16:37","startHours":15.258578501439949,"endHours":16.61568153569522,"quality":"inauspicious"},{"name":"Chala","start":"16:37","end":"17:58","startHours":16.61568153569522,"endHours":17.97278456995049,"quality":"neutral"}],"nightChoghadiyas":[{"name":"Roga","start":"17:58","end":"19:37","startHours":17.97278456995049,"endHours":19.61568153569522,"quality":"inauspicious"},{"name":"Udveg","start":"19:37","end":"21:16","startHours":19.61568153569522,"endHours":21.25857850143995,"quality":"inauspicious"},{"name":"Chala","start":"21:16","end":"22:54","startHours":21.25857850143995,"endHours":22.901475467184678,"quality":"neutral"},{"name":"Labha","start":"22:54","end":"00:33","startHours":22.901475467184678,"endHours":24.544372432929407,"quality":"auspicious"},{"name":"Amṛta","start":"00:33","end":"02:11","startHours":24.544372432929407,"endHours":26.18726939867414,"quality":"auspicious"},{"name":"Kāla","start":"02:11","end":"03:50","startHours":26.18726939867414,"endHours":27.830166364418865,"quality":"inauspicious"},{"name":"Śubha","start":"03:50","end":"05:28","startHours":27.830166364418865,"endHours":29.473063330163598,"quality":"auspicious"},{"name":"Roga","start":"05:28","end":"07:07","startHours":29.473063330163598,"endHours":31.115960295908323,"quality":"inauspicious"}],"horas":[{"name":"Hora 1","start":"07:07","end":"08:07","startHours":7.115960295908325,"endHours":8.115960295908325,"planetary_lord":"Venus"},{"name":"Hora 2","start":"08:07","end":"09:07","startHours":8.115960295908325,"endHours":9.115960295908325,"planetary_lord":"Sun"},{"name":"Hora 3","start":"09:07","end":"10:07","startHours":9.115960295908325,"endHours":10.115960295908325,"planetary_lord":"Mars"},{"name":"Hora 4","start":"10:07","end":"11:07","startHours":10.115960295908325,"endHours":11.115960295908325,"planetary_lord":"Jupiter"},{"name":"Hora 5","start":"11:07","end":"12:07","startHours":11.115960295908325,"endHours":12.115960295908325,"planetary_lord":"Saturn"},{"name":"Hora 6","start":"12:07","end":"13:07","startHours":12.115960295908325,"endHours":13.115960295908325,"planetary_lord":"Moon"},{"name":"Hora 7","start":"13:07","end":"14:07","startHours":13.115960295908325,"endHours":14.115960295908325,"planetary_lord":"Mercury"},{"name":"Hora 8","start":"14:07","end":"15:07","startHours":14.115960295908325,"endHours":15.115960295908325,"planetary_lord":"Venus"},{"name":"Hora 9","start":"15:07","end":"16:07","startHours":15.115960295908325,"endHours":16.115960295908323,"planetary_lord":"Sun"},{"name":"Hora 10","start":"16:07","end":"17:07","startHours":16.115960295908323,"endHours":17.115960295908323,"planetary_lord":"Mars"},{"name":"Hora 11","start":"17:07","end":"18:07","startHours":17.115960295908323,"endHours":18.115960295908323,"planetary_lord":"Jupiter"},{"name":"Hora 12","start":"18:07","end":"19:07","startHours":18.115960295908323,"endHours":19.115960295908323,"planetary_lord":"Saturn"},{"name":"Hora 13","start":"19:07","end":"20:07","startHours":19.115960295908323,"endHours":20.115960295908323,"planetary_lord":"Moon"},{"name":"Hora 14","start":"20:07","end":"21:07","startHours":20.115960295908323,"endHours":21.115960295908323,"planetary_lord":"Mercury"},{"name":"Hora 15","start":"21:07","end":"22:07","startHours":21.115960295908323,"endHours":22.115960295908323,"planetary_lord":"Venus"},{"name":"Hora 16","start":"22:07","end":"23:07","startHours":22.115960295908323,"endHours":23.115960295908323,"planetary_lord":"Sun"},{"name":"Hora 17","start":"23:07","end":"00:07","startHours":23.115960295908323,"endHours":24.115960295908323,"planetary_lord":"Mars"},{"name":"Hora 18","start":"00:07","end":"01:07","startHours":24.115960295908323,"endHours":25.115960295908323,"planetary_lord":"Jupiter"},{"name":"Hora 19","start":"01:07","end":"02:07","startHours":25.115960295908323,"endHours":26.115960295908323,"planetary_lord":"Saturn"},{"name":"Hora 20","start":"02:07","end":"03:07","startHours":26.115960295908323,"endHours":27.115960295908323,"planetary_lord":"Moon"},{"name":"Hora 21","start":"03:07","end":"04:07","startHours":27.115960295908323,"endHours":28.115960295908323,"planetary_lord":"Mercury"},{"name":"Hora 22","start":"04:07","end":"05:07","startHours":28.115960295908323,"endHours":29.115960295908323,"planetary_lord":"Venus"},{"name":"Hora 23","start":"05:07","end":"06:07","startHours":29.115960295908323,"endHours":30.115960295908323,"planetary_lord":"Sun"},{"name":"Hora 24","start":"06:07","end":"07:07","startHours":30.115960295908323,"endHours":31.115960295908323,"planetary_lord":"Mars"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Revatī"],"unfavorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Citrā","Svātī","Viśākhā","Anurādhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara 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":"West (Paścim)","chandraVasa":"North-East","rahuVasa":"South-East","anandadiYoga":{"name":"Vajra","quality":"Inauspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-17.720818877496043,"eotMinutes":-13.357145975764517,"ayanamsa":23.5887}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Daśamī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — 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 January 30, 1981 CE · Mathurā · Vidhyamitra","description":"January 30, 1981 CE for Mathurā: Kṛṣṇa Daśamī, sūryodaya 07:07, sūryāsta 17:58.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mathura/1981-01-30","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mathura/1981-01-30","sa":"https://sa.vidhyamitra.com/city/mathura/1981-01-30","hi":"https://hi.vidhyamitra.com/city/mathura/1981-01-30","x-default":"https://vidhyamitra.com/city/mathura/1981-01-30"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T19:29:53.396Z","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":"2026-05-14T19:29:53.396Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T19:29:53.396Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}