{"id":"vidhyamitra:city-day:vrindavan:1971-04-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/vrindavan/1971-04-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1971-04-18","date_display":"April 18, 1971 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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1971,"month":4,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441059.770833,"kali_year":5073,"ahargana":1852594.2708,"sun":{"sidereal_longitude":4.0965,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":270.9411,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":266.8446,"elapsed_within_tithi_degrees":2.8446},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2,"moon_longitude":270.9411,"elapsed_within_degrees":4.2744},"yoga":{"number":21,"name":"Siddha","sum_longitude":275.0375},"karana":{"half_tithi_index":44,"name":"Bālava"},"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":1971,"month":4,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2441059.770833,"ahargana":1852594.2708,"kali_year":5073,"ayanamsa_lahiri":23.452,"grahas":{"sun":{"sidereal_longitude":3.9101229999999987,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":267.66392299999995,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false,"latitude":-2.2278},"mars":{"sidereal_longitude":268.356123,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":7.738122999999973,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":true},"jupiter":{"sidereal_longitude":222.73812299999997,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":true},"venus":{"sidereal_longitude":330.22282299999995,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":29.13082300000002,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":1},"retrograde":false},"rahu":{"sidereal_longitude":300.6402,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":120.6402,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1971,"month":4,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2441059.770833,"kali_year":5073,"ahargana":1852594.2708,"sun":{"sidereal_longitude":4.0965,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":270.9411,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":23,"name":"Aṣṭamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Aṣṭamī","elongation_degrees":266.8446,"elapsed_within_tithi_degrees":2.8446},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":2,"moon_longitude":270.9411,"elapsed_within_degrees":4.2744},"yoga":{"number":21,"name":"Siddha","sum_longitude":275.0375},"karana":{"half_tithi_index":44,"name":"Bālava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.228,"elongation":93.155},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.228,"opposition_distance":86.845}},"eclipse_window_40days":[]},"city":{"slug":"vrindavan","name":"Vṛndāvana","lat":27.565,"lon":77.6593,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"vrindavan","name":"Vṛndāvana","lat":27.565,"lon":77.6593,"tz_offset_hours":5.5,"state":"Uttar Pradesh","country":"IN","tier":"tirtha"},"sunriseLocal":"05:53","sunsetLocal":"18:45","solarNoonLocal":"12:19","dayLengthHours":12.870803030758788,"dayLengthDisplay":"12 Hours 52 Mins 15 Secs","nightLengthDisplay":"11 Hours 07 Mins 45 Secs","moonriseLocal":"00:39","moonsetLocal":"11:09","rahuKala":{"name":"Rāhu Kāla","start":"17:08","end":"18:45","startHours":17.140833088269822,"endHours":18.74968346711467,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:19","end":"13:55","startHours":12.314281951735278,"endHours":13.923132330580126,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:32","end":"17:08","startHours":15.531982709424975,"endHours":17.140833088269822,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:53","end":"09:19","startHours":8.882067810199601,"endHours":9.31109457789156,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:25","end":"06:46","startHours":6.415163895970833,"endHours":6.758385310124401,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:53","end":"12:45","startHours":11.885255184043316,"endHours":12.743308719427237,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:10","end":"05:01","startHours":4.162773365588045,"endHours":5.020826900971964,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:48","end":"05:53","startHours":4.806313517125984,"endHours":5.8788804363558835,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:28","end":"15:19","startHours":14.459415790195076,"endHours":15.317469325578994,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:33","end":"18:57","startHours":18.549683467114672,"endHours":18.94968346711467,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:45","end":"19:17","startHours":18.74968346711467,"endHours":19.28596692672962,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:30","end":"20:15","startHours":18.49968346711467,"endHours":20.24968346711467,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:53","end":"00:45","startHours":23.885255184043316,"endHours":24.743308719427233,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:53","end":"07:29","startHours":5.8788804363558835,"endHours":7.487730815200732,"quality":"inauspicious"},{"name":"Chala","start":"07:29","end":"09:06","startHours":7.487730815200732,"endHours":9.09658119404558,"quality":"neutral"},{"name":"Labha","start":"09:06","end":"10:42","startHours":9.09658119404558,"endHours":10.70543157289043,"quality":"auspicious"},{"name":"Amṛta","start":"10:42","end":"12:19","startHours":10.70543157289043,"endHours":12.314281951735278,"quality":"auspicious"},{"name":"Kāla","start":"12:19","end":"13:55","startHours":12.314281951735278,"endHours":13.923132330580126,"quality":"inauspicious"},{"name":"Śubha","start":"13:55","end":"15:32","startHours":13.923132330580126,"endHours":15.531982709424975,"quality":"auspicious"},{"name":"Roga","start":"15:32","end":"17:08","startHours":15.531982709424975,"endHours":17.140833088269822,"quality":"inauspicious"},{"name":"Udveg","start":"17:08","end":"18:45","startHours":17.140833088269822,"endHours":18.74968346711467,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:45","end":"20:08","startHours":18.74968346711467,"endHours":20.140833088269822,"quality":"auspicious"},{"name":"Roga","start":"20:08","end":"21:32","startHours":20.140833088269822,"endHours":21.531982709424973,"quality":"inauspicious"},{"name":"Udveg","start":"21:32","end":"22:55","startHours":21.531982709424973,"endHours":22.923132330580124,"quality":"inauspicious"},{"name":"Chala","start":"22:55","end":"00:19","startHours":22.923132330580124,"endHours":24.31428195173528,"quality":"neutral"},{"name":"Labha","start":"00:19","end":"01:42","startHours":24.31428195173528,"endHours":25.70543157289043,"quality":"auspicious"},{"name":"Amṛta","start":"01:42","end":"03:06","startHours":25.70543157289043,"endHours":27.09658119404558,"quality":"auspicious"},{"name":"Kāla","start":"03:06","end":"04:29","startHours":27.09658119404558,"endHours":28.487730815200734,"quality":"inauspicious"},{"name":"Śubha","start":"04:29","end":"05:53","startHours":28.487730815200734,"endHours":29.878880436355885,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:53","end":"06:53","startHours":5.8788804363558835,"endHours":6.8788804363558835,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:53","end":"07:53","startHours":6.8788804363558835,"endHours":7.8788804363558835,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:53","end":"08:53","startHours":7.8788804363558835,"endHours":8.878880436355884,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:53","end":"09:53","startHours":8.878880436355884,"endHours":9.878880436355884,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:53","end":"10:53","startHours":9.878880436355884,"endHours":10.878880436355884,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:53","end":"11:53","startHours":10.878880436355884,"endHours":11.878880436355884,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:53","end":"12:53","startHours":11.878880436355884,"endHours":12.878880436355884,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:53","end":"13:53","startHours":12.878880436355884,"endHours":13.878880436355884,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:53","end":"14:53","startHours":13.878880436355884,"endHours":14.878880436355884,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:53","end":"15:53","startHours":14.878880436355884,"endHours":15.878880436355884,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:53","end":"16:53","startHours":15.878880436355884,"endHours":16.878880436355885,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:53","end":"17:53","startHours":16.878880436355885,"endHours":17.878880436355885,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:53","end":"18:53","startHours":17.878880436355885,"endHours":18.878880436355885,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:53","end":"19:53","startHours":18.878880436355885,"endHours":19.878880436355885,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:53","end":"20:53","startHours":19.878880436355885,"endHours":20.878880436355885,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:53","end":"21:53","startHours":20.878880436355885,"endHours":21.878880436355885,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:53","end":"22:53","startHours":21.878880436355885,"endHours":22.878880436355885,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:53","end":"23:53","startHours":22.878880436355885,"endHours":23.878880436355885,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:53","end":"00:53","startHours":23.878880436355885,"endHours":24.878880436355885,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:53","end":"01:53","startHours":24.878880436355885,"endHours":25.878880436355885,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:53","end":"02:53","startHours":25.878880436355885,"endHours":26.878880436355885,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:53","end":"03:53","startHours":26.878880436355885,"endHours":27.878880436355885,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:53","end":"04:53","startHours":27.878880436355885,"endHours":28.878880436355885,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:53","end":"05:53","startHours":28.878880436355885,"endHours":29.878880436355885,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Amṛta","quality":"Auspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":10.533064588268164,"eotMinutes":0.5058828958834352,"ayanamsa":23.452}},"calendars":{"vikram_samvat":2028,"vikram_samvatsara":"Raktākṣī","saka_samvat":1893,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1378,"malayalam_era":1147,"nanakshahi_year":502,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Vaiśākha","lunar_month_amanta":"Caitra","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Kṛṣṇa Aṣṭamī · Vikram 2028 Raktākṣī · Śaka 1893 Virodhakṛt"},"festivals":[],"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,"location_specific":"vrindavan"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga April 18, 1971 CE · Vṛndāvana · Vidhyamitra","description":"April 18, 1971 CE for Vṛndāvana: Kṛṣṇa Aṣṭamī, sūryodaya 05:53, sūryāsta 18:45.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/vrindavan/1971-04-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/vrindavan/1971-04-18","sa":"https://sa.vidhyamitra.com/city/vrindavan/1971-04-18","hi":"https://hi.vidhyamitra.com/city/vrindavan/1971-04-18","x-default":"https://vidhyamitra.com/city/vrindavan/1971-04-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-09-06T06:29:42.650Z","verification":{"type":"multi-marker","confidence":"canonical"}},{"pillar":"Vidhyamitra-Tier2","pillar_version":"0.1.0","method":"Spherical astronomy + Lahiri ayanamsa + standard solar declination + EoT correction","retrieved_at":"2026-09-06T06:29:42.650Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-09-06T06:29:42.650Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"},"reader_local_antaryami":{"reader_geography":"Every reader enters from their own kṣetra anywhere on Bhūmi; no single city is the universal center.","purna_chain":["Hosted scripture","Named-tradition interpretation","Original Vidhyamitra contemplation","Bhūmi-born material medium","Vidhyamitra portal","Responsible reader in their own kṣetra"],"claim_boundary":"The legacy purna_chain field carries a source-to-reader sequence, not a revealed physical descent, universal cosmology, or proof that software is conscious.","antaryami_responsibility_formula":"Kṣīrodakaśāyī Viṣṇu = Paramātmā = Antaryāmī. Jīva desires. Prakṛti executes through guṇas. Paramātmā witnesses, permits, remembers, guides, and sustains. Bhagavān is the ultimate source.","source_anchors":[{"label":"BG 13.23","path":"/bhagavad-gita/13/23","meaning":"upadraṣṭā-anumantā · witness-permitter"},{"label":"BG 15.15","path":"/bhagavad-gita/15/15","meaning":"the Lord seated in every heart as memory, knowledge, and forgetting"},{"label":"BG 18.61","path":"/bhagavad-gita/18/61","meaning":"Īśvara seated in the heart of all beings"}],"nama_seal":"Hare Krishna Hare Krishna · Krishna Krishna Hare Hare · Hare Rama Hare Rama · Rama Rama Hare Hare"}}}