{"id":"vidhyamitra:city-day:mathura:1931-02-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/mathura/1931-02-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1931-02-01","date_display":"February 1, 1931 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":1931,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2426373.770833,"kali_year":5032,"ahargana":1837908.2708,"sun":{"sidereal_longitude":288.5093,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":81.4246,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":152.9153,"elapsed_within_tithi_degrees":8.9153},"nakshatra":{"number":7,"name":"Punarvasu","pada":1,"moon_longitude":81.4246,"elapsed_within_degrees":1.4246},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":9.9338},"karana":{"half_tithi_index":25,"name":"Taitila"},"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":1931,"month":2,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2426373.770833,"ahargana":1837908.2708,"kali_year":5032,"ayanamsa_lahiri":22.8903,"grahas":{"sun":{"sidereal_longitude":288.330236,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":80.83403599999997,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false,"latitude":4.4629},"mars":{"sidereal_longitude":103.29673600000001,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":true},"mercury":{"sidereal_longitude":264.556236,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":80.09203600000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":true},"venus":{"sidereal_longitude":242.37843599999997,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":264.7973360000001,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":358.7752,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":178.7752,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":14,"name":"Citrā","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":1931,"month":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2426373.770833,"kali_year":5032,"ahargana":1837908.2708,"sun":{"sidereal_longitude":288.5093,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":81.4246,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":13,"name":"Trayodaśī","paksha":"Śukla","full_name":"Śukla Trayodaśī","elongation_degrees":152.9153,"elapsed_within_tithi_degrees":8.9153},"nakshatra":{"number":7,"name":"Punarvasu","pada":1,"moon_longitude":81.4246,"elapsed_within_degrees":1.4246},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":9.9338},"karana":{"half_tithi_index":25,"name":"Taitila"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.463,"elongation":152.915},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.463,"opposition_distance":27.085}},"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":"07:07","sunsetLocal":"17:59","solarNoonLocal":"12:33","dayLengthHours":10.880776438650592,"dayLengthDisplay":"10 Hours 52 Mins 51 Secs","nightLengthDisplay":"13 Hours 07 Mins 09 Secs","moonriseLocal":"15:50","moonsetLocal":"05:36","rahuKala":{"name":"Rāhu Kāla","start":"16:38","end":"17:59","startHours":16.630200299783898,"endHours":17.990297354615223,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:33","end":"13:55","startHours":12.549909135289926,"endHours":13.91000619012125,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:16","end":"16:38","startHours":15.270103244952573,"endHours":16.630200299783898,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:39","end":"10:01","startHours":9.648368751649768,"endHours":10.011061299604787,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:34","end":"07:51","startHours":7.562886600908404,"endHours":7.85304063927242,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:11","end":"12:55","startHours":12.187216587334907,"endHours":12.912601683244946,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:40","end":"06:23","startHours":5.65875072414455,"endHours":6.38413582005459,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:12","end":"07:07","startHours":6.20278954607708,"endHours":7.109520915964629,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:22","end":"15:05","startHours":14.363371875065024,"endHours":15.088756970975064,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:47","end":"18:11","startHours":17.790297354615223,"endHours":18.190297354615222,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:59","end":"18:27","startHours":17.990297354615223,"endHours":18.443663039559,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:44","end":"19:29","startHours":17.740297354615223,"endHours":19.490297354615223,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:11","end":"00:55","startHours":24.187216587334905,"endHours":24.912601683244947,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"07:07","end":"08:28","startHours":7.109520915964629,"endHours":8.469617970795953,"quality":"inauspicious"},{"name":"Chala","start":"08:28","end":"09:50","startHours":8.469617970795953,"endHours":9.829715025627277,"quality":"neutral"},{"name":"Labha","start":"09:50","end":"11:11","startHours":9.829715025627277,"endHours":11.189812080458601,"quality":"auspicious"},{"name":"Amṛta","start":"11:11","end":"12:33","startHours":11.189812080458601,"endHours":12.549909135289926,"quality":"auspicious"},{"name":"Kāla","start":"12:33","end":"13:55","startHours":12.549909135289926,"endHours":13.91000619012125,"quality":"inauspicious"},{"name":"Śubha","start":"13:55","end":"15:16","startHours":13.91000619012125,"endHours":15.270103244952573,"quality":"auspicious"},{"name":"Roga","start":"15:16","end":"16:38","startHours":15.270103244952573,"endHours":16.630200299783898,"quality":"inauspicious"},{"name":"Udveg","start":"16:38","end":"17:59","startHours":16.630200299783898,"endHours":17.990297354615223,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:59","end":"19:38","startHours":17.990297354615223,"endHours":19.630200299783898,"quality":"auspicious"},{"name":"Roga","start":"19:38","end":"21:16","startHours":19.630200299783898,"endHours":21.270103244952573,"quality":"inauspicious"},{"name":"Udveg","start":"21:16","end":"22:55","startHours":21.270103244952573,"endHours":22.91000619012125,"quality":"inauspicious"},{"name":"Chala","start":"22:55","end":"00:33","startHours":22.91000619012125,"endHours":24.549909135289926,"quality":"neutral"},{"name":"Labha","start":"00:33","end":"02:11","startHours":24.549909135289926,"endHours":26.1898120804586,"quality":"auspicious"},{"name":"Amṛta","start":"02:11","end":"03:50","startHours":26.1898120804586,"endHours":27.82971502562728,"quality":"auspicious"},{"name":"Kāla","start":"03:50","end":"05:28","startHours":27.82971502562728,"endHours":29.469617970795955,"quality":"inauspicious"},{"name":"Śubha","start":"05:28","end":"07:07","startHours":29.469617970795955,"endHours":31.10952091596463,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:07","end":"08:07","startHours":7.109520915964629,"endHours":8.10952091596463,"planetary_lord":"Sun"},{"name":"Hora 2","start":"08:07","end":"09:07","startHours":8.10952091596463,"endHours":9.10952091596463,"planetary_lord":"Mars"},{"name":"Hora 3","start":"09:07","end":"10:07","startHours":9.10952091596463,"endHours":10.10952091596463,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"10:07","end":"11:07","startHours":10.10952091596463,"endHours":11.10952091596463,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"11:07","end":"12:07","startHours":11.10952091596463,"endHours":12.10952091596463,"planetary_lord":"Moon"},{"name":"Hora 6","start":"12:07","end":"13:07","startHours":12.10952091596463,"endHours":13.10952091596463,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"13:07","end":"14:07","startHours":13.10952091596463,"endHours":14.10952091596463,"planetary_lord":"Venus"},{"name":"Hora 8","start":"14:07","end":"15:07","startHours":14.10952091596463,"endHours":15.10952091596463,"planetary_lord":"Sun"},{"name":"Hora 9","start":"15:07","end":"16:07","startHours":15.10952091596463,"endHours":16.10952091596463,"planetary_lord":"Mars"},{"name":"Hora 10","start":"16:07","end":"17:07","startHours":16.10952091596463,"endHours":17.10952091596463,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"17:07","end":"18:07","startHours":17.10952091596463,"endHours":18.10952091596463,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"18:07","end":"19:07","startHours":18.10952091596463,"endHours":19.10952091596463,"planetary_lord":"Moon"},{"name":"Hora 13","start":"19:07","end":"20:07","startHours":19.10952091596463,"endHours":20.10952091596463,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"20:07","end":"21:07","startHours":20.10952091596463,"endHours":21.10952091596463,"planetary_lord":"Venus"},{"name":"Hora 15","start":"21:07","end":"22:07","startHours":21.10952091596463,"endHours":22.10952091596463,"planetary_lord":"Sun"},{"name":"Hora 16","start":"22:07","end":"23:07","startHours":22.10952091596463,"endHours":23.10952091596463,"planetary_lord":"Mars"},{"name":"Hora 17","start":"23:07","end":"00:07","startHours":23.10952091596463,"endHours":24.10952091596463,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"00:07","end":"01:07","startHours":24.10952091596463,"endHours":25.10952091596463,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"01:07","end":"02:07","startHours":25.10952091596463,"endHours":26.10952091596463,"planetary_lord":"Moon"},{"name":"Hora 20","start":"02:07","end":"03:07","startHours":26.10952091596463,"endHours":27.10952091596463,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"03:07","end":"04:07","startHours":27.10952091596463,"endHours":28.10952091596463,"planetary_lord":"Venus"},{"name":"Hora 22","start":"04:07","end":"05:07","startHours":28.10952091596463,"endHours":29.10952091596463,"planetary_lord":"Sun"},{"name":"Hora 23","start":"05:07","end":"06:07","startHours":29.10952091596463,"endHours":30.10952091596463,"planetary_lord":"Mars"},{"name":"Hora 24","start":"06:07","end":"07:07","startHours":30.10952091596463,"endHours":31.10952091596463,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Hasta","Citrā","Svātī","Viśākhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"West (Paścim)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Dhvaja","quality":"Auspicious"},"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":-17.407512909011874,"eotMinutes":-13.689348117395623,"ayanamsa":22.8903}},"calendars":{"vikram_samvat":1988,"vikram_samvatsara":"Tāraṇa","saka_samvat":1853,"saka_samvatsara":"Prajāpati","bengali_samvat":1338,"malayalam_era":1107,"nanakshahi_year":462,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Śukla Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Śukla Trayodaśī · Vikram 1988 Tāraṇa · Śaka 1853 Prajāpati"},"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},{"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":[{"historical_date":"-1626101-04-03","event":"Bhagavān Rāma's birth at Ayodhyā","chart_id":"rama","shared_marker":"same Punarvasu","url":"/day/-1626101-04-03","relevance":0.5}]},"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 February 1, 1931 CE · Mathurā · Vidhyamitra","description":"February 1, 1931 CE for Mathurā: Śukla Trayodaśī, sūryodaya 07:07, sūryāsta 17:59.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/mathura/1931-02-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/mathura/1931-02-01","sa":"https://sa.vidhyamitra.com/city/mathura/1931-02-01","hi":"https://hi.vidhyamitra.com/city/mathura/1931-02-01","x-default":"https://vidhyamitra.com/city/mathura/1931-02-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-14T17:07:16.413Z","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":"2026-05-14T17:07:16.413Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-14T17:07:16.413Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}