{"id":"vidhyamitra:day:-3121-04-07:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/-3121-04-07","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"-3121-04-07","date_display":"April 7, 3122 BCE","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":-3121,"month":4,"day":7,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":581208.770833,"kali_year":-19,"ahargana":-7256.7292,"sun":{"sidereal_longitude":48.866,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":140.1725,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":91.3064,"elapsed_within_tithi_degrees":7.3064},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3,"moon_longitude":140.1725,"elapsed_within_degrees":6.8391},"yoga":{"number":15,"name":"Vajra","sum_longitude":189.0385},"karana":{"half_tithi_index":15,"name":"Bava"},"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":-3121,"month":4,"day":7,"hour":6,"minute":30,"calendar":"julian"},"julian_day":581208.770833,"ahargana":-7256.7292,"kali_year":-19,"ayanamsa_lahiri":-47.6804,"grahas":{"sun":{"sidereal_longitude":48.866,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":140.1725,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3},"retrograde":false,"latitude":-4.0549},"mars":{"sidereal_longitude":118.1161,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":68.7823,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":110.7809,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":7.8786,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":119.0346,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":204.4964,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":24.4964,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","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":-3121,"month":4,"day":7,"hour":6,"minute":30,"second":0,"calendar":"julian"},"julian_day":581208.770833,"kali_year":-19,"ahargana":-7256.7292,"sun":{"sidereal_longitude":48.866,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":140.1725,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":91.3064,"elapsed_within_tithi_degrees":7.3064},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":3,"moon_longitude":140.1725,"elapsed_within_degrees":6.8391},"yoga":{"number":15,"name":"Vajra","sum_longitude":189.0385},"karana":{"half_tithi_index":15,"name":"Bava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.055,"elongation":91.306},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.055,"opposition_distance":88.694}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":-3064,"saka_samvat":-3199,"bengali_samvat":-3714,"malayalam_era":-3945,"nanakshahi_year":-4590,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Śukla Pakṣa","solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Śukla Aṣṭamī · Vikram -3064 undefined · Śaka -3199 undefined"},"festivals":[{"id":"vrishabha-sankranti","name":"Vṛṣabha Saṅkrānti","name_sanskrit":"वृषभ सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Taurus.","vrata":false,"detection":{"sun_rashi":"Vṛṣabha"},"precedence":5}],"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":"-3137-12-25","event":"Bhīṣma's Mahaprasthan","chart_id":"bhishma","shared_marker":"same Śukla Aṣṭamī","url":"/day/-3137-12-25","relevance":0.5}]},"validity":{"eternal":true},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga April 7, 3122 BCE · Vidhyamitra","description":"Vedic pañchāṅga for April 7, 3122 BCE: Śukla Aṣṭamī · Pūrva Phalgunī.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/-3121-04-07","hreflang_alternates":{"en":"https://vidhyamitra.com/day/-3121-04-07","sa":"https://sa.vidhyamitra.com/day/-3121-04-07","hi":"https://hi.vidhyamitra.com/day/-3121-04-07","x-default":"https://vidhyamitra.com/day/-3121-04-07"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-22T09:10:15.550Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-22T09:10:15.550Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}