{"id":"vidhyamitra:city-day:rishikesh:1964-08-31:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1964-08-31","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1964-08-31","date_display":"August 31, 1964 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":1964,"month":8,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2438638.770833,"kali_year":5066,"ahargana":1850173.2708,"sun":{"sidereal_longitude":133.7062,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":53.5332,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":279.8271,"elapsed_within_tithi_degrees":3.8271},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":1,"moon_longitude":53.5332,"elapsed_within_degrees":0.1999},"yoga":{"number":15,"name":"Vajra","sum_longitude":187.2394},"karana":{"half_tithi_index":46,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"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":1964,"month":8,"day":31,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2438638.770833,"ahargana":1850173.2708,"kali_year":5066,"ayanamsa_lahiri":23.3594,"grahas":{"sun":{"sidereal_longitude":134.305223,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":1},"retrograde":false},"moon":{"sidereal_longitude":52.87472300000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":4,"name":"Rohiṇī","pada":4},"retrograde":false,"latitude":-1.1926},"mars":{"sidereal_longitude":87.59742299999999,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"mercury":{"sidereal_longitude":139.25172299999997,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":11,"name":"Pūrva Phalgunī","pada":2},"retrograde":true},"jupiter":{"sidereal_longitude":33.11962299999999,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"venus":{"sidereal_longitude":88.91212300000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":308.5558229999999,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":68.9165,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":6,"name":"Ārdrā","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":248.9165,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","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":1964,"month":8,"day":31,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2438638.770833,"kali_year":5066,"ahargana":1850173.2708,"sun":{"sidereal_longitude":133.7062,"rashi":5,"rashi_name":"Siṃha"},"moon":{"sidereal_longitude":53.5332,"rashi":2,"rashi_name":"Vṛṣabha"},"tithi":{"number":24,"name":"Navamī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Navamī","elongation_degrees":279.8271,"elapsed_within_tithi_degrees":3.8271},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":1,"moon_longitude":53.5332,"elapsed_within_degrees":0.1999},"yoga":{"number":15,"name":"Vajra","sum_longitude":187.2394},"karana":{"half_tithi_index":46,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.193,"elongation":80.173},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.193,"opposition_distance":99.827}},"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":"05:53","sunsetLocal":"18:41","solarNoonLocal":"12:17","dayLengthHours":12.808131041613455,"dayLengthDisplay":"12 Hours 48 Mins 29 Secs","nightLengthDisplay":"11 Hours 11 Mins 31 Secs","moonriseLocal":"23:52","moonsetLocal":"13:50","rahuKala":{"name":"Rāhu Kāla","start":"07:29","end":"09:05","startHours":7.476684367338499,"endHours":9.077700747540181,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"10:41","end":"12:17","startHours":10.678717127741862,"endHours":12.279733507943543,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:53","end":"15:29","startHours":13.880749888145226,"endHours":15.481766268346908,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:52","end":"09:17","startHours":8.864231896846622,"endHours":9.291169598233738,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:25","end":"06:45","startHours":6.4093401138707105,"endHours":6.750890274980403,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:51","end":"12:42","startHours":11.85279580655643,"endHours":12.706671209330658,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"04:10","end":"05:01","startHours":4.167917181588356,"endHours":5.021792584362586,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:48","end":"05:53","startHours":4.808323733669029,"endHours":5.875667987136817,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:25","end":"15:16","startHours":14.41442201487912,"endHours":15.26829741765335,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:29","end":"18:53","startHours":18.483799028750273,"endHours":18.88379902875027,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:41","end":"19:13","startHours":18.683799028750272,"endHours":19.217471155484166,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:26","end":"20:11","startHours":18.433799028750272,"endHours":20.183799028750272,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:51","end":"00:42","startHours":23.85279580655643,"endHours":24.706671209330658,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"05:53","end":"07:29","startHours":5.875667987136817,"endHours":7.476684367338499,"quality":"auspicious"},{"name":"Kāla","start":"07:29","end":"09:05","startHours":7.476684367338499,"endHours":9.077700747540181,"quality":"inauspicious"},{"name":"Śubha","start":"09:05","end":"10:41","startHours":9.077700747540181,"endHours":10.678717127741862,"quality":"auspicious"},{"name":"Roga","start":"10:41","end":"12:17","startHours":10.678717127741862,"endHours":12.279733507943543,"quality":"inauspicious"},{"name":"Udveg","start":"12:17","end":"13:53","startHours":12.279733507943543,"endHours":13.880749888145226,"quality":"inauspicious"},{"name":"Chala","start":"13:53","end":"15:29","startHours":13.880749888145226,"endHours":15.481766268346908,"quality":"neutral"},{"name":"Labha","start":"15:29","end":"17:05","startHours":15.481766268346908,"endHours":17.08278264854859,"quality":"auspicious"},{"name":"Amṛta","start":"17:05","end":"18:41","startHours":17.08278264854859,"endHours":18.683799028750272,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:41","end":"20:05","startHours":18.683799028750272,"endHours":20.08278264854859,"quality":"neutral"},{"name":"Labha","start":"20:05","end":"21:29","startHours":20.08278264854859,"endHours":21.48176626834691,"quality":"auspicious"},{"name":"Amṛta","start":"21:29","end":"22:53","startHours":21.48176626834691,"endHours":22.880749888145225,"quality":"auspicious"},{"name":"Kāla","start":"22:53","end":"00:17","startHours":22.880749888145225,"endHours":24.279733507943543,"quality":"inauspicious"},{"name":"Śubha","start":"00:17","end":"01:41","startHours":24.279733507943543,"endHours":25.678717127741862,"quality":"auspicious"},{"name":"Roga","start":"01:41","end":"03:05","startHours":25.678717127741862,"endHours":27.07770074754018,"quality":"inauspicious"},{"name":"Udveg","start":"03:05","end":"04:29","startHours":27.07770074754018,"endHours":28.4766843673385,"quality":"inauspicious"},{"name":"Chala","start":"04:29","end":"05:53","startHours":28.4766843673385,"endHours":29.875667987136815,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"05:53","end":"06:53","startHours":5.875667987136817,"endHours":6.875667987136817,"planetary_lord":"Moon"},{"name":"Hora 2","start":"06:53","end":"07:53","startHours":6.875667987136817,"endHours":7.875667987136817,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"07:53","end":"08:53","startHours":7.875667987136817,"endHours":8.875667987136817,"planetary_lord":"Venus"},{"name":"Hora 4","start":"08:53","end":"09:53","startHours":8.875667987136817,"endHours":9.875667987136817,"planetary_lord":"Sun"},{"name":"Hora 5","start":"09:53","end":"10:53","startHours":9.875667987136817,"endHours":10.875667987136817,"planetary_lord":"Mars"},{"name":"Hora 6","start":"10:53","end":"11:53","startHours":10.875667987136817,"endHours":11.875667987136817,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"11:53","end":"12:53","startHours":11.875667987136817,"endHours":12.875667987136817,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"12:53","end":"13:53","startHours":12.875667987136817,"endHours":13.875667987136817,"planetary_lord":"Moon"},{"name":"Hora 9","start":"13:53","end":"14:53","startHours":13.875667987136817,"endHours":14.875667987136817,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"14:53","end":"15:53","startHours":14.875667987136817,"endHours":15.875667987136817,"planetary_lord":"Venus"},{"name":"Hora 11","start":"15:53","end":"16:53","startHours":15.875667987136817,"endHours":16.875667987136815,"planetary_lord":"Sun"},{"name":"Hora 12","start":"16:53","end":"17:53","startHours":16.875667987136815,"endHours":17.875667987136815,"planetary_lord":"Mars"},{"name":"Hora 13","start":"17:53","end":"18:53","startHours":17.875667987136815,"endHours":18.875667987136815,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"18:53","end":"19:53","startHours":18.875667987136815,"endHours":19.875667987136815,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"19:53","end":"20:53","startHours":19.875667987136815,"endHours":20.875667987136815,"planetary_lord":"Moon"},{"name":"Hora 16","start":"20:53","end":"21:53","startHours":20.875667987136815,"endHours":21.875667987136815,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"21:53","end":"22:53","startHours":21.875667987136815,"endHours":22.875667987136815,"planetary_lord":"Venus"},{"name":"Hora 18","start":"22:53","end":"23:53","startHours":22.875667987136815,"endHours":23.875667987136815,"planetary_lord":"Sun"},{"name":"Hora 19","start":"23:53","end":"00:53","startHours":23.875667987136815,"endHours":24.875667987136815,"planetary_lord":"Mars"},{"name":"Hora 20","start":"00:53","end":"01:53","startHours":24.875667987136815,"endHours":25.875667987136815,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"01:53","end":"02:53","startHours":25.875667987136815,"endHours":26.875667987136815,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"02:53","end":"03:53","startHours":26.875667987136815,"endHours":27.875667987136815,"planetary_lord":"Moon"},{"name":"Hora 23","start":"03:53","end":"04:53","startHours":27.875667987136815,"endHours":28.875667987136815,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"04:53","end":"05:53","startHours":28.875667987136815,"endHours":29.875667987136815,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Maghā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Mūla","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Karka","Tulā","Vṛścika","Kumbha","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Siṃha","Kanyā","Dhanu","Makara"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Vajra","quality":"Inauspicious"},"drikRitu":"Varṣā (Monsoon) (Drik)","vedicRitu":"Varṣā (Monsoon)","drikAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":8.693531089308873,"eotMinutes":0.14558952338733633,"ayanamsa":23.3594}},"calendars":{"vikram_samvat":2021,"vikram_samvatsara":"Piṅgala","saka_samvat":1886,"saka_samvatsara":"Krodhi","bengali_samvat":1371,"malayalam_era":1140,"nanakshahi_year":495,"lunar_month":"Bhādrapada","lunar_month_paksha_full":"Bhādrapada Kṛṣṇa Pakṣa","solar_month":"Siṃha (Āvaṇi)","ritu":"Varṣā (Monsoon)","display_summary":"Bhādrapada Kṛṣṇa Navamī · Vikram 2021 Piṅgala · Śaka 1886 Krodhi"},"festivals":[{"id":"simha-sankranti","name":"Siṁha Saṅkrānti","name_sanskrit":"सिंह सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Leo.","vrata":false,"detection":{"sun_rashi":"Siṃha"},"precedence":5}],"todays_walk":{"walk":{"id":"chandra-walk","name":"Candra Walk","name_sanskrit":"चन्द्र यात्रा","type":"graha","description":"Manas-control + BG 6.5-7.","step_count":5,"url":"/walk/chandra-walk"},"reason":"Somavāra (Monday) — its presiding graha's walk."},"cosmic_resonances":[]},"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 August 31, 1964 CE · Ṛṣikeśa · Vidhyamitra","description":"August 31, 1964 CE for Ṛṣikeśa: Kṛṣṇa Navamī, sūryodaya 05:53, sūryāsta 18:41.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1964-08-31","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1964-08-31","sa":"https://sa.vidhyamitra.com/city/rishikesh/1964-08-31","hi":"https://hi.vidhyamitra.com/city/rishikesh/1964-08-31","x-default":"https://vidhyamitra.com/city/rishikesh/1964-08-31"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-20T03:20:26.673Z","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":"2026-05-20T03:20:26.673Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-20T03:20:26.673Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}