{"id":"vidhyamitra:day:1808-02-21:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1808-02-21","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1808-02-21","date_display":"February 21, 1808 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":1808,"month":2,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2381468.770833,"kali_year":4909,"ahargana":1793003.2708,"sun":{"sidereal_longitude":310.6933,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":246.6726,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":25,"name":"Daśamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Daśamī","elongation_degrees":295.9793,"elapsed_within_tithi_degrees":7.9793},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":246.6726,"elapsed_within_degrees":6.6726},"yoga":{"number":15,"name":"Vajra","sum_longitude":197.3659},"karana":{"half_tithi_index":49,"name":"Viṣṭi"},"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":1808,"month":2,"day":21,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2381468.770833,"ahargana":1793003.2708,"kali_year":4909,"ayanamsa_lahiri":21.1728,"grahas":{"sun":{"sidereal_longitude":310.11543800000004,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":247.60043800000005,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":3},"retrograde":false,"latitude":2.1534},"mars":{"sidereal_longitude":326.16303800000003,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":323.22133799999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"jupiter":{"sidereal_longitude":308.05423800000005,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":false},"venus":{"sidereal_longitude":272.34633799999995,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":212.84483799999998,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","pada":4},"retrograde":false},"rahu":{"sidereal_longitude":218.0582,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":38.0582,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","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":1808,"month":2,"day":21,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2381468.770833,"kali_year":4909,"ahargana":1793003.2708,"sun":{"sidereal_longitude":310.6933,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":246.6726,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":25,"name":"Daśamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Daśamī","elongation_degrees":295.9793,"elapsed_within_tithi_degrees":7.9793},"nakshatra":{"number":19,"name":"Mūla","pada":3,"moon_longitude":246.6726,"elapsed_within_degrees":6.6726},"yoga":{"number":15,"name":"Vajra","sum_longitude":197.3659},"karana":{"half_tithi_index":49,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":2.153,"elongation":64.021},"lunar":{"type":"lunar","occurs":false,"moon_latitude":2.153,"opposition_distance":115.979}},"eclipse_window_40days":[]},"calendars":{"vikram_samvat":1865,"vikram_samvatsara":"Vṛṣa","saka_samvat":1730,"saka_samvatsara":"Vibhava","bengali_samvat":1215,"malayalam_era":984,"nanakshahi_year":339,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Kṛṣṇa Daśamī · Vikram 1865 Vṛṣa · Śaka 1730 Vibhava"},"festivals":[{"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":"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":[]},"validity":{"eternal":false,"valid_from":"1808-02-21T00:00:00Z"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate; Vidhyamitra substrate"},"seo":{"title":"Pañchāṅga February 21, 1808 CE · Vidhyamitra","description":"Vedic pañchāṅga for February 21, 1808 CE: Kṛṣṇa Daśamī · Mūla.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/day/1808-02-21","hreflang_alternates":{"en":"https://vidhyamitra.com/day/1808-02-21","sa":"https://sa.vidhyamitra.com/day/1808-02-21","hi":"https://hi.vidhyamitra.com/day/1808-02-21","x-default":"https://vidhyamitra.com/day/1808-02-21"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-22T12:50:13.504Z","verification":{"type":"multi-marker","confidence":"canonical"}}],"meta":{"generated_at":"2026-05-22T12:50:13.504Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa"}}}