{"id":"vidhyamitra:day:1778-04-04:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1778-04-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1778-04-04","date_display":"April 4, 1778 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":1778,"month":4,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2370554.770833,"kali_year":4879,"ahargana":1782089.2708,"sun":{"sidereal_longitude":354.267,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":78.2044,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":83.9374,"elapsed_within_tithi_degrees":11.9374},"nakshatra":{"number":6,"name":"Ārdrā","pada":4,"moon_longitude":78.2044,"elapsed_within_degrees":11.5377},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":72.4714},"karana":{"half_tithi_index":13,"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":1778,"month":4,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2370554.770833,"ahargana":1782089.2708,"kali_year":4879,"ayanamsa_lahiri":20.7554,"grahas":{"sun":{"sidereal_longitude":353.600633,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"moon":{"sidereal_longitude":79.92743300000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":4},"retrograde":false,"latitude":0.1467},"mars":{"sidereal_longitude":12.149033000000031,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":348.978333,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":118.21993300000003,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":true},"venus":{"sidereal_longitude":359.443333,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":206.08223299999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":76.3344,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":256.3344,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","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":1778,"month":4,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2370554.770833,"kali_year":4879,"ahargana":1782089.2708,"sun":{"sidereal_longitude":354.267,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":78.2044,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":7,"name":"Saptamī","paksha":"Śukla","full_name":"Śukla Saptamī","elongation_degrees":83.9374,"elapsed_within_tithi_degrees":11.9374},"nakshatra":{"number":6,"name":"Ārdrā","pada":4,"moon_longitude":78.2044,"elapsed_within_degrees":11.5377},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":72.4714},"karana":{"half_tithi_index":13,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":0.147,"elongation":83.937},"lunar":{"type":"lunar","occurs":false,"moon_latitude":0.147,"opposition_distance":96.063}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":1835,"vikram_samvatsara":"Virodhakṛt","saka_samvat":1700,"saka_samvatsara":"Vilambī","bengali_samvat":1185,"malayalam_era":954,"nanakshahi_year":309,"lunar_month":"Caitra","lunar_month_paksha_full":"Caitra Śukla Pakṣa","solar_month":"Mīna (Paṅkuṇi)","ritu":"Vasanta (Spring)","display_summary":"Caitra Śukla Saptamī · Vikram 1835 Virodhakṛt · Śaka 1700 Vilambī"},"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}],"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":"1778-04-04T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga April 4, 1778 CE · Vidhyamitra","description":"Vedic pañchāṅga for April 4, 1778 CE: Śukla Saptamī · Ārdrā.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/1778-04-04","hreflang_alternates":{"en":"https://vidhyamitra.com/day/1778-04-04","sa":"https://sa.vidhyamitra.com/day/1778-04-04","hi":"https://hi.vidhyamitra.com/day/1778-04-04","x-default":"https://vidhyamitra.com/day/1778-04-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-25T20:37:06.374Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-25T20:37:06.374Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}