{"id":"vidhyamitra:city-day:mathura:1973-04-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mathura/1973-04-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1973-04-01","date_display":"April 1, 1973 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":1973,"month":4,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441773.770833,"kali_year":5074,"ahargana":1853308.2708,"sun":{"sidereal_longitude":347.9212,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":315.9976,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":328.0764,"elapsed_within_tithi_degrees":4.0764},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3,"moon_longitude":315.9976,"elapsed_within_degrees":9.3309},"yoga":{"number":23,"name":"Śubha","sum_longitude":303.9188},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"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":1973,"month":4,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441773.770833,"ahargana":1853308.2708,"kali_year":5074,"ayanamsa_lahiri":23.4793,"grahas":{"sun":{"sidereal_longitude":347.692343,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":316.07724299999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false,"latitude":3.6014},"mars":{"sidereal_longitude":280.547643,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":322.960143,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":283.92464300000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"venus":{"sidereal_longitude":345.835143,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":52.34114299999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":262.8091,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":82.8091,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"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":1973,"month":4,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441773.770833,"kali_year":5074,"ahargana":1853308.2708,"sun":{"sidereal_longitude":347.9212,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":315.9976,"rashi":11,"rashi_name":"Kumbha"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":328.0764,"elapsed_within_tithi_degrees":4.0764},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3,"moon_longitude":315.9976,"elapsed_within_degrees":9.3309},"yoga":{"number":23,"name":"Śubha","sum_longitude":303.9188},"karana":{"half_tithi_index":54,"name":"Gara"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.601,"elongation":31.924},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.601,"opposition_distance":148.076}},"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":"06:11","sunsetLocal":"18:37","solarNoonLocal":"12:24","dayLengthHours":12.433077306628796,"dayLengthDisplay":"12 Hours 25 Mins 59 Secs","nightLengthDisplay":"11 Hours 34 Mins 01 Secs","moonriseLocal":"04:31","moonsetLocal":"16:03","rahuKala":{"name":"Rāhu Kāla","start":"17:03","end":"18:37","startHours":17.05656225833832,"endHours":18.61069692166692,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:24","end":"13:57","startHours":12.394158268352523,"endHours":13.948292931681122,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:30","end":"17:03","startHours":15.50242759500972,"endHours":17.05656225833832,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:05","end":"09:30","startHours":9.078670986584843,"endHours":9.493106896805804,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:42","end":"07:02","startHours":6.695664502814324,"endHours":7.027213230991093,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:59","end":"12:49","startHours":11.979722358131564,"endHours":12.808594178573482,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:31","end":"05:21","startHours":4.519875974154285,"endHours":5.348747794596204,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:08","end":"06:11","startHours":5.141529839485725,"endHours":6.177619615038124,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:28","end":"15:18","startHours":14.466337819457323,"endHours":15.295209639899243,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:25","end":"18:49","startHours":18.410696921666922,"endHours":18.81069692166692,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:37","end":"19:08","startHours":18.61069692166692,"endHours":19.12874180944312,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:22","end":"20:07","startHours":18.36069692166692,"endHours":20.11069692166692,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:59","end":"00:49","startHours":23.979722358131564,"endHours":24.808594178573482,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:11","end":"07:44","startHours":6.177619615038124,"endHours":7.731754278366724,"quality":"inauspicious"},{"name":"Chala","start":"07:44","end":"09:17","startHours":7.731754278366724,"endHours":9.285888941695323,"quality":"neutral"},{"name":"Labha","start":"09:17","end":"10:50","startHours":9.285888941695323,"endHours":10.840023605023923,"quality":"auspicious"},{"name":"Amṛta","start":"10:50","end":"12:24","startHours":10.840023605023923,"endHours":12.394158268352523,"quality":"auspicious"},{"name":"Kāla","start":"12:24","end":"13:57","startHours":12.394158268352523,"endHours":13.948292931681122,"quality":"inauspicious"},{"name":"Śubha","start":"13:57","end":"15:30","startHours":13.948292931681122,"endHours":15.50242759500972,"quality":"auspicious"},{"name":"Roga","start":"15:30","end":"17:03","startHours":15.50242759500972,"endHours":17.05656225833832,"quality":"inauspicious"},{"name":"Udveg","start":"17:03","end":"18:37","startHours":17.05656225833832,"endHours":18.61069692166692,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:37","end":"20:03","startHours":18.61069692166692,"endHours":20.05656225833832,"quality":"auspicious"},{"name":"Roga","start":"20:03","end":"21:30","startHours":20.05656225833832,"endHours":21.50242759500972,"quality":"inauspicious"},{"name":"Udveg","start":"21:30","end":"22:57","startHours":21.50242759500972,"endHours":22.948292931681124,"quality":"inauspicious"},{"name":"Chala","start":"22:57","end":"00:24","startHours":22.948292931681124,"endHours":24.394158268352523,"quality":"neutral"},{"name":"Labha","start":"00:24","end":"01:50","startHours":24.394158268352523,"endHours":25.840023605023923,"quality":"auspicious"},{"name":"Amṛta","start":"01:50","end":"03:17","startHours":25.840023605023923,"endHours":27.285888941695326,"quality":"auspicious"},{"name":"Kāla","start":"03:17","end":"04:44","startHours":27.285888941695326,"endHours":28.731754278366726,"quality":"inauspicious"},{"name":"Śubha","start":"04:44","end":"06:11","startHours":28.731754278366726,"endHours":30.177619615038125,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:11","end":"07:11","startHours":6.177619615038124,"endHours":7.177619615038124,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:11","end":"08:11","startHours":7.177619615038124,"endHours":8.177619615038125,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:11","end":"09:11","startHours":8.177619615038125,"endHours":9.177619615038125,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:11","end":"10:11","startHours":9.177619615038125,"endHours":10.177619615038125,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:11","end":"11:11","startHours":10.177619615038125,"endHours":11.177619615038125,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:11","end":"12:11","startHours":11.177619615038125,"endHours":12.177619615038125,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:11","end":"13:11","startHours":12.177619615038125,"endHours":13.177619615038125,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:11","end":"14:11","startHours":13.177619615038125,"endHours":14.177619615038125,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:11","end":"15:11","startHours":14.177619615038125,"endHours":15.177619615038125,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:11","end":"16:11","startHours":15.177619615038125,"endHours":16.177619615038125,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:11","end":"17:11","startHours":16.177619615038125,"endHours":17.177619615038125,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:11","end":"18:11","startHours":17.177619615038125,"endHours":18.177619615038125,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:11","end":"19:11","startHours":18.177619615038125,"endHours":19.177619615038125,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:11","end":"20:11","startHours":19.177619615038125,"endHours":20.177619615038125,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:11","end":"21:11","startHours":20.177619615038125,"endHours":21.177619615038125,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:11","end":"22:11","startHours":21.177619615038125,"endHours":22.177619615038125,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:11","end":"23:11","startHours":22.177619615038125,"endHours":23.177619615038125,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:11","end":"00:11","startHours":23.177619615038125,"endHours":24.177619615038125,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:11","end":"01:11","startHours":24.177619615038125,"endHours":25.177619615038125,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:11","end":"02:11","startHours":25.177619615038125,"endHours":26.177619615038125,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:11","end":"03:11","startHours":26.177619615038125,"endHours":27.177619615038125,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:11","end":"04:11","startHours":27.177619615038125,"endHours":28.177619615038125,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:11","end":"05:11","startHours":28.177619615038125,"endHours":29.177619615038125,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:11","end":"06:11","startHours":29.177619615038125,"endHours":30.177619615038125,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Punarvasu","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Uttara Phalgunī","Hasta","Citrā","Svātī","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Dhanu","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Mātaṇga","quality":"Auspicious"},"drikRitu":"Vasanta (Spring) (Drik)","vedicRitu":"Śiśira (Winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":4.419605695733402,"eotMinutes":-4.344296101151456,"ayanamsa":23.4793}},"calendars":{"vikram_samvat":2030,"vikram_samvatsara":"Akṣaya","saka_samvat":1895,"saka_samvatsara":"Pramādī","bengali_samvat":1380,"malayalam_era":1149,"nanakshahi_year":504,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Kṛṣṇa Pakṣa","solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Kṛṣṇa Trayodaśī · Vikram 2030 Akṣaya · Śaka 1895 Pramādī"},"festivals":[{"id":"mina-sankranti","name":"Mīna Saṅkrānti","name_sanskrit":"मीन सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Pisces; Mīna-māsa begins.","vrata":false,"detection":{"sun_rashi":"Mīna"},"precedence":5},{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"todays_walk":{"walk":{"id":"surya-walk","name":"Sūrya Walk","name_sanskrit":"सूर्य यात्रा","type":"graha","description":"Self-illumination + BG 4.1 (Sun-lineage of Gītā transmission).","step_count":6,"url":"/walk/surya-walk"},"reason":"Ravivāra (Sunday) — 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 April 1, 1973 CE · Mathurā · Vidhyamitra","description":"April 1, 1973 CE for Mathurā: Kṛṣṇa Trayodaśī, sūryodaya 06:11, sūryāsta 18:37.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mathura/1973-04-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mathura/1973-04-01","sa":"https://sa.vidhyamitra.com/city/mathura/1973-04-01","hi":"https://hi.vidhyamitra.com/city/mathura/1973-04-01","x-default":"https://vidhyamitra.com/city/mathura/1973-04-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T17:42:51.584Z","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":"2026-05-14T17:42:51.584Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T17:42:51.584Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}