{"id":"vidhyamitra:day:1818-01-31:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1818-01-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1818-01-31","date_display":"January 31, 1818 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":1818,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2385100.770833,"kali_year":4919,"ahargana":1796635.2708,"sun":{"sidereal_longitude":289.7752,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":219.0471,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":25,"name":"Daśamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Daśamī","elongation_degrees":289.2718,"elapsed_within_tithi_degrees":1.2718},"nakshatra":{"number":17,"name":"Anurādhā","pada":2,"moon_longitude":219.0471,"elapsed_within_degrees":5.7137},"yoga":{"number":12,"name":"Dhruva","sum_longitude":148.8223},"karana":{"half_tithi_index":48,"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":1818,"month":1,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2385100.770833,"ahargana":1796635.2708,"kali_year":4919,"ayanamsa_lahiri":21.3118,"grahas":{"sun":{"sidereal_longitude":289.325968,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":216.79046800000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false,"latitude":-1.0441},"mars":{"sidereal_longitude":51.42066799999998,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":277.116168,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":true},"jupiter":{"sidereal_longitude":253.41666800000007,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":281.86926800000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":315.668268,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":25.6173,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":205.6173,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","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":1818,"month":1,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2385100.770833,"kali_year":4919,"ahargana":1796635.2708,"sun":{"sidereal_longitude":289.7752,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":219.0471,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":25,"name":"Daśamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Daśamī","elongation_degrees":289.2718,"elapsed_within_tithi_degrees":1.2718},"nakshatra":{"number":17,"name":"Anurādhā","pada":2,"moon_longitude":219.0471,"elapsed_within_degrees":5.7137},"yoga":{"number":12,"name":"Dhruva","sum_longitude":148.8223},"karana":{"half_tithi_index":48,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.044,"elongation":70.728},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.044,"opposition_distance":109.272}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":1875,"vikram_samvatsara":"Khara","saka_samvat":1740,"saka_samvatsara":"Bahudhānya","bengali_samvat":1225,"malayalam_era":994,"nanakshahi_year":349,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Daśamī · Vikram 1875 Khara · Śaka 1740 Bahudhānya"},"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":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"valid_from":"1818-01-31T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga January 31, 1818 CE · Vidhyamitra","description":"Vedic pañchāṅga for January 31, 1818 CE: Kṛṣṇa Daśamī · Anurādhā.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/1818-01-31","hreflang_alternates":{"en":"https://vidhyamitra.com/day/1818-01-31","sa":"https://sa.vidhyamitra.com/day/1818-01-31","hi":"https://hi.vidhyamitra.com/day/1818-01-31","x-default":"https://vidhyamitra.com/day/1818-01-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-21T20:02:30.076Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-21T20:02:30.076Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}