{"id":"vidhyamitra:day:2279-12-20:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/2279-12-20","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2279-12-20","date_display":"December 20, 2279 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":2279,"month":12,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2553800.770833,"kali_year":5381,"ahargana":1965335.2708,"sun":{"sidereal_longitude":238.9248,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":74.4279,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":195.5031,"elapsed_within_tithi_degrees":3.5031},"nakshatra":{"number":6,"name":"Ārdrā","pada":3,"moon_longitude":74.4279,"elapsed_within_degrees":7.7612},"yoga":{"number":24,"name":"Śukla","sum_longitude":313.3526},"karana":{"half_tithi_index":32,"name":"Taitila"},"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":2279,"month":12,"day":20,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2553800.770833,"ahargana":1965335.2708,"kali_year":5381,"ayanamsa_lahiri":27.7639,"grahas":{"sun":{"sidereal_longitude":239.97318799999994,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"moon":{"sidereal_longitude":73.00398799999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":2},"retrograde":false,"latitude":-0.9846},"mars":{"sidereal_longitude":253.74858799999993,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":256.09408800000006,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":221.68418799999995,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":213.42758800000001,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":211.472488,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":87.0795,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":267.0795,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara 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":2279,"month":12,"day":20,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2553800.770833,"kali_year":5381,"ahargana":1965335.2708,"sun":{"sidereal_longitude":238.9248,"rashi":8,"rashi_name":"Vṛścika"},"moon":{"sidereal_longitude":74.4279,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":17,"name":"Dvitīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Dvitīyā","elongation_degrees":195.5031,"elapsed_within_tithi_degrees":3.5031},"nakshatra":{"number":6,"name":"Ārdrā","pada":3,"moon_longitude":74.4279,"elapsed_within_degrees":7.7612},"yoga":{"number":24,"name":"Śukla","sum_longitude":313.3526},"karana":{"half_tithi_index":32,"name":"Taitila"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-0.985,"elongation":164.497},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-0.985,"opposition_distance":15.503}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":2336,"vikram_samvatsara":"Aṅgirasa","saka_samvat":2201,"saka_samvatsara":"Siddhārthī","bengali_samvat":1686,"malayalam_era":1455,"nanakshahi_year":810,"lunar_month":"Mārgaśīrṣa","lunar_month_paksha_full":"Mārgaśīrṣa Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Mārgaśīrṣa","lunar_month_amanta":"Mārgaśīrṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛścika (Kārttikai)","ritu":"Hemanta (Pre-winter)","display_summary":"Mārgaśīrṣa Kṛṣṇa Dvitīyā · Vikram 2336 Aṅgirasa · Śaka 2201 Siddhārthī"},"festivals":[],"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":"2279-12-20T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga December 20, 2279 CE · Vidhyamitra","description":"Vedic pañchāṅga for December 20, 2279 CE: Kṛṣṇa Dvitīyā · Ārdrā.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/2279-12-20","hreflang_alternates":{"en":"https://vidhyamitra.com/day/2279-12-20","sa":"https://sa.vidhyamitra.com/day/2279-12-20","hi":"https://hi.vidhyamitra.com/day/2279-12-20","x-default":"https://vidhyamitra.com/day/2279-12-20"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-01T05:36:40.941Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-06-01T05:36:40.941Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}