{"id":"vidhyamitra:city-day:rishikesh:1966-09-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1966-09-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1966-09-04","date_display":"September 4, 1966 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":1966,"month":9,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439372.770833,"kali_year":5068,"ahargana":1850907.2708,"sun":{"sidereal_longitude":137.0657,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":4.6454,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":227.5797,"elapsed_within_tithi_degrees":11.5797},"nakshatra":{"number":1,"name":"Aśvinī","pada":2,"moon_longitude":4.6454,"elapsed_within_degrees":4.6454},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":141.7111},"karana":{"half_tithi_index":37,"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":1966,"month":9,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2439372.770833,"ahargana":1850907.2708,"kali_year":5068,"ayanamsa_lahiri":23.3875,"grahas":{"sun":{"sidereal_longitude":137.681979,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":1.679378999999983,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":1},"retrograde":false,"latitude":-1.9272},"mars":{"sidereal_longitude":103.092379,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":132.18527900000004,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":93.16767900000002,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":7,"name":"Punarvasu","pada":4},"retrograde":false},"venus":{"sidereal_longitude":121.01997900000003,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":334.737979,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":30.0256,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":210.0256,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":16,"name":"Viśākhā","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":1966,"month":9,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2439372.770833,"kali_year":5068,"ahargana":1850907.2708,"sun":{"sidereal_longitude":137.0657,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":4.6454,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":227.5797,"elapsed_within_tithi_degrees":11.5797},"nakshatra":{"number":1,"name":"Aśvinī","pada":2,"moon_longitude":4.6454,"elapsed_within_degrees":4.6454},"yoga":{"number":11,"name":"Vṛddhi","sum_longitude":141.7111},"karana":{"half_tithi_index":37,"name":"Bālava"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.927,"elongation":132.42},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.927,"opposition_distance":47.58}},"eclipse_window_40days":[]},"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"tier2":{"city":{"slug":"rishikesh","name":"Ṛṣikeśa","lat":30.0869,"lon":78.2676,"tz_offset_hours":5.5,"state":"Uttarakhand","country":"IN","tier":"tirtha"},"sunriseLocal":"05:54","sunsetLocal":"18:37","solarNoonLocal":"12:15","dayLengthHours":12.706371185581183,"dayLengthDisplay":"12 Hours 42 Mins 23 Secs","nightLengthDisplay":"11 Hours 17 Mins 37 Secs","moonriseLocal":"20:46","moonsetLocal":"09:37","rahuKala":{"name":"Rāhu Kāla","start":"17:01","end":"18:37","startHours":17.022085259638676,"endHours":18.610381657836324,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:15","end":"13:51","startHours":12.257196065045733,"endHours":13.845492463243382,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:26","end":"17:01","startHours":15.433788861441029,"endHours":17.022085259638676,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:52","end":"09:18","startHours":8.868830415557417,"endHours":9.292376121743457,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:26","end":"06:46","startHours":6.4334426049876905,"endHours":6.772279169936522,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:50","end":"12:41","startHours":11.833650358859693,"endHours":12.680741771231773,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:13","end":"05:03","startHours":4.209827647510983,"endHours":5.056919059883063,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:51","end":"05:54","startHours":4.845146206790043,"endHours":5.904010472255141,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:22","end":"15:13","startHours":14.37492459597593,"endHours":15.222016008348008,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:25","end":"18:49","startHours":18.410381657836325,"endHours":18.810381657836324,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:37","end":"19:08","startHours":18.610381657836324,"endHours":19.139813790568873,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:22","end":"20:07","startHours":18.360381657836324,"endHours":20.110381657836324,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:50","end":"00:41","startHours":23.833650358859693,"endHours":24.680741771231773,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:54","end":"07:30","startHours":5.904010472255141,"endHours":7.492306870452789,"quality":"inauspicious"},{"name":"Chala","start":"07:30","end":"09:05","startHours":7.492306870452789,"endHours":9.080603268650437,"quality":"neutral"},{"name":"Labha","start":"09:05","end":"10:40","startHours":9.080603268650437,"endHours":10.668899666848084,"quality":"auspicious"},{"name":"Amṛta","start":"10:40","end":"12:15","startHours":10.668899666848084,"endHours":12.257196065045733,"quality":"auspicious"},{"name":"Kāla","start":"12:15","end":"13:51","startHours":12.257196065045733,"endHours":13.845492463243382,"quality":"inauspicious"},{"name":"Śubha","start":"13:51","end":"15:26","startHours":13.845492463243382,"endHours":15.433788861441029,"quality":"auspicious"},{"name":"Roga","start":"15:26","end":"17:01","startHours":15.433788861441029,"endHours":17.022085259638676,"quality":"inauspicious"},{"name":"Udveg","start":"17:01","end":"18:37","startHours":17.022085259638676,"endHours":18.610381657836324,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:37","end":"20:01","startHours":18.610381657836324,"endHours":20.022085259638676,"quality":"auspicious"},{"name":"Roga","start":"20:01","end":"21:26","startHours":20.022085259638676,"endHours":21.43378886144103,"quality":"inauspicious"},{"name":"Udveg","start":"21:26","end":"22:51","startHours":21.43378886144103,"endHours":22.84549246324338,"quality":"inauspicious"},{"name":"Chala","start":"22:51","end":"00:15","startHours":22.84549246324338,"endHours":24.257196065045733,"quality":"neutral"},{"name":"Labha","start":"00:15","end":"01:40","startHours":24.257196065045733,"endHours":25.668899666848084,"quality":"auspicious"},{"name":"Amṛta","start":"01:40","end":"03:05","startHours":25.668899666848084,"endHours":27.080603268650435,"quality":"auspicious"},{"name":"Kāla","start":"03:05","end":"04:30","startHours":27.080603268650435,"endHours":28.49230687045279,"quality":"inauspicious"},{"name":"Śubha","start":"04:30","end":"05:54","startHours":28.49230687045279,"endHours":29.90401047225514,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:54","end":"06:54","startHours":5.904010472255141,"endHours":6.904010472255141,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:54","end":"07:54","startHours":6.904010472255141,"endHours":7.904010472255141,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:54","end":"08:54","startHours":7.904010472255141,"endHours":8.904010472255141,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:54","end":"09:54","startHours":8.904010472255141,"endHours":9.904010472255141,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:54","end":"10:54","startHours":9.904010472255141,"endHours":10.904010472255141,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:54","end":"11:54","startHours":10.904010472255141,"endHours":11.904010472255141,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:54","end":"12:54","startHours":11.904010472255141,"endHours":12.904010472255141,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:54","end":"13:54","startHours":12.904010472255141,"endHours":13.904010472255141,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:54","end":"14:54","startHours":13.904010472255141,"endHours":14.904010472255141,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:54","end":"15:54","startHours":14.904010472255141,"endHours":15.904010472255141,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:54","end":"16:54","startHours":15.904010472255141,"endHours":16.90401047225514,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:54","end":"17:54","startHours":16.90401047225514,"endHours":17.90401047225514,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:54","end":"18:54","startHours":17.90401047225514,"endHours":18.90401047225514,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:54","end":"19:54","startHours":18.90401047225514,"endHours":19.90401047225514,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:54","end":"20:54","startHours":19.90401047225514,"endHours":20.90401047225514,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:54","end":"21:54","startHours":20.90401047225514,"endHours":21.90401047225514,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:54","end":"22:54","startHours":21.90401047225514,"endHours":22.90401047225514,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:54","end":"23:54","startHours":22.90401047225514,"endHours":23.90401047225514,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:54","end":"00:54","startHours":23.90401047225514,"endHours":24.90401047225514,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:54","end":"01:54","startHours":24.90401047225514,"endHours":25.90401047225514,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:54","end":"02:54","startHours":25.90401047225514,"endHours":26.90401047225514,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:54","end":"03:54","startHours":26.90401047225514,"endHours":27.90401047225514,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:54","end":"04:54","startHours":27.90401047225514,"endHours":28.90401047225514,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:54","end":"05:54","startHours":28.90401047225514,"endHours":29.90401047225514,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Svātī","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj"],"unfavorable_nakshatras":["Aśvinī","Punarvasu","Puṣya","Aśleṣā","Maghā","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Meṣa","Mithuna","Kanyā","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Vṛṣabha","Karka","Siṃha","Vṛścika","Dhanu","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Ānanda","quality":"Auspicious"},"tropicalRitu":"Varṣā (Monsoon) (tropical)","vedicRitu":"Varṣā (Monsoon)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":7.413710874948828,"eotMinutes":1.4978360972560227,"ayanamsa":23.3875}},"calendars":{"vikram_samvat":2023,"vikram_samvatsara":"Siddhārthī","saka_samvat":1888,"saka_samvatsara":"Parābhava","bengali_samvat":1373,"malayalam_era":1142,"nanakshahi_year":497,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Bhādrapada","lunar_month_amanta":"Śrāvaṇa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Kṛṣṇa Caturthī · Vikram 2023 Siddhārthī · Śaka 1888 Parābhava"},"festivals":[{"id":"sankashti-chaturthi","name":"Saṅkaṣṭī Caturthī","name_sanskrit":"सङ्कष्टी चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Gaṇeśa vrata.","vrata":true,"detection":{"tithi_number":19,"tithi_paksha":"Kṛṣṇa"},"precedence":6}],"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":[{"historical_date":"-3101-02-18","event":"Kali Yuga Epoch","chart_id":"kali-yuga-epoch","shared_marker":"same Aśvinī","url":"/day/-3101-02-18","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"rishikesh"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga September 4, 1966 CE · Ṛṣikeśa · Vidhyamitra","description":"September 4, 1966 CE for Ṛṣikeśa: Kṛṣṇa Caturthī, sūryodaya 05:54, sūryāsta 18:37.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1966-09-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1966-09-04","sa":"https://sa.vidhyamitra.com/city/rishikesh/1966-09-04","hi":"https://hi.vidhyamitra.com/city/rishikesh/1966-09-04","x-default":"https://vidhyamitra.com/city/rishikesh/1966-09-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T12:40:36.856Z","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":"2026-05-31T12:40:36.856Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T12:40:36.856Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}