{"id":"vidhyamitra:day:2121-02-28:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/2121-02-28","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2121-02-28","date_display":"February 28, 2121 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":2121,"month":2,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2495797.770833,"kali_year":5222,"ahargana":1907332.2708,"sun":{"sidereal_longitude":313.7309,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":84.1633,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":130.4325,"elapsed_within_tithi_degrees":10.4325},"nakshatra":{"number":7,"name":"Punarvasu","pada":2,"moon_longitude":84.1633,"elapsed_within_degrees":4.1633},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":37.8942},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"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":2121,"month":2,"day":28,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2495797.770833,"ahargana":1907332.2708,"kali_year":5222,"ayanamsa_lahiri":25.5455,"grahas":{"sun":{"sidereal_longitude":313.86782900000003,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":86.42122900000004,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":2},"retrograde":false,"latitude":1.2538},"mars":{"sidereal_longitude":106.78162899999995,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":true},"mercury":{"sidereal_longitude":290.7170289999999,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":82.93892900000003,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":true},"venus":{"sidereal_longitude":304.322129,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":true},"saturn":{"sidereal_longitude":60.38092899999998,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":280.3576,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":100.3576,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"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":2121,"month":2,"day":28,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2495797.770833,"kali_year":5222,"ahargana":1907332.2708,"sun":{"sidereal_longitude":313.7309,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":84.1633,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":11,"name":"Ekādaśī","paksha":"Śukla","full_name":"Śukla Ekādaśī","elongation_degrees":130.4325,"elapsed_within_tithi_degrees":10.4325},"nakshatra":{"number":7,"name":"Punarvasu","pada":2,"moon_longitude":84.1633,"elapsed_within_degrees":4.1633},"yoga":{"number":3,"name":"Āyuṣmān","sum_longitude":37.8942},"karana":{"half_tithi_index":21,"name":"Viṣṭi"},"vara":{"number":0,"name":"Śukravāra (Friday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":1.254,"elongation":130.432},"lunar":{"type":"lunar","occurs":false,"moon_latitude":1.254,"opposition_distance":49.568}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":2178,"vikram_samvatsara":"Jaya","saka_samvat":2043,"saka_samvatsara":"Vṛṣa","bengali_samvat":1528,"malayalam_era":1297,"nanakshahi_year":652,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Śukla Pakṣa","solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Śukla Ekādaśī · Vikram 2178 Jaya · Śaka 2043 Vṛṣa"},"festivals":[{"id":"amalaki-ekadashi","name":"Āmalakī Ekādaśī","name_sanskrit":"आमलकी एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu (in Āmalakī tree)","significance":"Worship of Āmalakī (Indian gooseberry, sacred to Viṣṇu).","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Phālguna"},"precedence":4},{"id":"rangbhari-ekadashi","name":"Raṅgbhari Ekādaśī","name_sanskrit":"रङ्गभरी एकादशी","tradition":"Shaiva","associated_deity":"Śiva-Pārvatī","significance":"Kāśī tradition: Śiva brings Pārvatī home; rang-utsava begins.","vrata":true,"detection":{"tithi_number":11,"tithi_paksha":"Śukla","lunar_month":"Phālguna"},"precedence":4},{"id":"ekadashi","name":"Ekādaśī","name_sanskrit":"एकादशी","tradition":"Vaishnava","associated_deity":"Bhagavān Viṣṇu","significance":"Sacred to Bhagavān Viṣṇu; vrata for purification.","vrata":true,"detection":{"any_of":[{"tithi_number":11},{"tithi_number":26}]},"precedence":5},{"id":"kumbha-sankranti","name":"Kumbha Saṅkrānti","name_sanskrit":"कुम्भ सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aquarius; Kumbha-māsa begins.","vrata":false,"detection":{"sun_rashi":"Kumbha"},"precedence":5}],"todays_walk":{"walk":{"id":"shukra-walk","name":"Śukra Walk","name_sanskrit":"शुक्र यात्रा","type":"graha","description":"Beauty + creativity in dharma + BG 10.36.","step_count":5,"url":"/walk/shukra-walk"},"reason":"Śukravāra (Friday) — 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,"valid_from":"2121-02-28T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga February 28, 2121 CE · Vidhyamitra","description":"Vedic pañchāṅga for February 28, 2121 CE: Śukla Ekādaśī · Punarvasu.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/2121-02-28","hreflang_alternates":{"en":"https://vidhyamitra.com/day/2121-02-28","sa":"https://sa.vidhyamitra.com/day/2121-02-28","hi":"https://hi.vidhyamitra.com/day/2121-02-28","x-default":"https://vidhyamitra.com/day/2121-02-28"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-16T18:09:34.376Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-16T18:09:34.376Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}