{"id":"vidhyamitra:city-day:rishikesh:1964-02-01:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1964-02-01","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1964-02-01","date_display":"February 1, 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":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2438426.770833,"kali_year":5065,"ahargana":1849961.2708,"sun":{"sidereal_longitude":287.9586,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":147.6018,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":219.6432,"elapsed_within_tithi_degrees":3.6432},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1,"moon_longitude":147.6018,"elapsed_within_degrees":0.9351},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":75.5604},"karana":{"half_tithi_index":36,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"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":2,"day":1,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2438426.770833,"ahargana":1849961.2708,"kali_year":5065,"ayanamsa_lahiri":23.3513,"grahas":{"sun":{"sidereal_longitude":287.85962300000006,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":3},"retrograde":false},"moon":{"sidereal_longitude":146.731023,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false,"latitude":4.1554},"mars":{"sidereal_longitude":291.9039230000001,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":264.09702300000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":352.154323,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"venus":{"sidereal_longitude":325.32302300000003,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":301.20022300000005,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":80.1492,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":7,"name":"Punarvasu","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":260.1492,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","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":2,"day":1,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2438426.770833,"kali_year":5065,"ahargana":1849961.2708,"sun":{"sidereal_longitude":287.9586,"rashi":10,"rashi_name":"Makara"},"moon":{"sidereal_longitude":147.6018,"rashi":5,"rashi_name":"Siṃha"},"tithi":{"number":19,"name":"Caturthī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Caturthī","elongation_degrees":219.6432,"elapsed_within_tithi_degrees":3.6432},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1,"moon_longitude":147.6018,"elapsed_within_degrees":0.9351},"yoga":{"number":6,"name":"Atigaṇḍa","sum_longitude":75.5604},"karana":{"half_tithi_index":36,"name":"Bava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":4.155,"elongation":140.357},"lunar":{"type":"lunar","occurs":false,"moon_latitude":4.155,"opposition_distance":39.643}},"eclipse_window_40days":[{"offset_days":-17,"type":"solar","occurs":true,"moon_latitude":-0.89,"elongation":1.925}]},"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":"07:08","sunsetLocal":"17:53","solarNoonLocal":"12:31","dayLengthHours":10.740911888539152,"dayLengthDisplay":"10 Hours 44 Mins 27 Secs","nightLengthDisplay":"13 Hours 15 Mins 33 Secs","moonriseLocal":"20:54","moonsetLocal":"09:18","rahuKala":{"name":"Rāhu Kāla","start":"09:50","end":"11:10","startHours":9.825087829821808,"endHours":11.1677018158892,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:51","end":"15:12","startHours":13.852929788023989,"endHours":15.195543774091384,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:08","end":"08:29","startHours":7.139859857687019,"endHours":8.482473843754413,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:39","end":"10:00","startHours":9.646072631679488,"endHours":10.004103027964126,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:35","end":"07:52","startHours":7.587397853042817,"endHours":7.873822170070528,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:09","end":"12:52","startHours":12.152285405671956,"endHours":12.868346198241232,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:42","end":"06:25","startHours":5.707738272548465,"endHours":6.423799065117742,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:15","end":"07:08","startHours":6.244783866975423,"endHours":7.139859857687019,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:18","end":"15:01","startHours":14.300467783379787,"endHours":15.016528575949064,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:41","end":"18:05","startHours":17.68077174622617,"endHours":18.08077174622617,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:53","end":"18:20","startHours":17.88077174622617,"endHours":18.32830974158197,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:38","end":"19:23","startHours":17.63077174622617,"endHours":19.38077174622617,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:09","end":"00:52","startHours":24.152285405671954,"endHours":24.868346198241234,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"07:08","end":"08:29","startHours":7.139859857687019,"endHours":8.482473843754413,"quality":"inauspicious"},{"name":"Śubha","start":"08:29","end":"09:50","startHours":8.482473843754413,"endHours":9.825087829821808,"quality":"auspicious"},{"name":"Roga","start":"09:50","end":"11:10","startHours":9.825087829821808,"endHours":11.1677018158892,"quality":"inauspicious"},{"name":"Udveg","start":"11:10","end":"12:31","startHours":11.1677018158892,"endHours":12.510315801956594,"quality":"inauspicious"},{"name":"Chala","start":"12:31","end":"13:51","startHours":12.510315801956594,"endHours":13.852929788023989,"quality":"neutral"},{"name":"Labha","start":"13:51","end":"15:12","startHours":13.852929788023989,"endHours":15.195543774091384,"quality":"auspicious"},{"name":"Amṛta","start":"15:12","end":"16:32","startHours":15.195543774091384,"endHours":16.538157760158775,"quality":"auspicious"},{"name":"Kāla","start":"16:32","end":"17:53","startHours":16.538157760158775,"endHours":17.88077174622617,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"17:53","end":"19:32","startHours":17.88077174622617,"endHours":19.538157760158775,"quality":"auspicious"},{"name":"Amṛta","start":"19:32","end":"21:12","startHours":19.538157760158775,"endHours":21.195543774091384,"quality":"auspicious"},{"name":"Kāla","start":"21:12","end":"22:51","startHours":21.195543774091384,"endHours":22.85292978802399,"quality":"inauspicious"},{"name":"Śubha","start":"22:51","end":"00:31","startHours":22.85292978802399,"endHours":24.510315801956594,"quality":"auspicious"},{"name":"Roga","start":"00:31","end":"02:10","startHours":24.510315801956594,"endHours":26.1677018158892,"quality":"inauspicious"},{"name":"Udveg","start":"02:10","end":"03:50","startHours":26.1677018158892,"endHours":27.825087829821804,"quality":"inauspicious"},{"name":"Chala","start":"03:50","end":"05:29","startHours":27.825087829821804,"endHours":29.482473843754413,"quality":"neutral"},{"name":"Labha","start":"05:29","end":"07:08","startHours":29.482473843754413,"endHours":31.139859857687018,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:08","end":"08:08","startHours":7.139859857687019,"endHours":8.139859857687018,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"08:08","end":"09:08","startHours":8.139859857687018,"endHours":9.139859857687018,"planetary_lord":"Moon"},{"name":"Hora 3","start":"09:08","end":"10:08","startHours":9.139859857687018,"endHours":10.139859857687018,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"10:08","end":"11:08","startHours":10.139859857687018,"endHours":11.139859857687018,"planetary_lord":"Venus"},{"name":"Hora 5","start":"11:08","end":"12:08","startHours":11.139859857687018,"endHours":12.139859857687018,"planetary_lord":"Sun"},{"name":"Hora 6","start":"12:08","end":"13:08","startHours":12.139859857687018,"endHours":13.139859857687018,"planetary_lord":"Mars"},{"name":"Hora 7","start":"13:08","end":"14:08","startHours":13.139859857687018,"endHours":14.139859857687018,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"14:08","end":"15:08","startHours":14.139859857687018,"endHours":15.139859857687018,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"15:08","end":"16:08","startHours":15.139859857687018,"endHours":16.139859857687018,"planetary_lord":"Moon"},{"name":"Hora 10","start":"16:08","end":"17:08","startHours":16.139859857687018,"endHours":17.139859857687018,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"17:08","end":"18:08","startHours":17.139859857687018,"endHours":18.139859857687018,"planetary_lord":"Venus"},{"name":"Hora 12","start":"18:08","end":"19:08","startHours":18.139859857687018,"endHours":19.139859857687018,"planetary_lord":"Sun"},{"name":"Hora 13","start":"19:08","end":"20:08","startHours":19.139859857687018,"endHours":20.139859857687018,"planetary_lord":"Mars"},{"name":"Hora 14","start":"20:08","end":"21:08","startHours":20.139859857687018,"endHours":21.139859857687018,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"21:08","end":"22:08","startHours":21.139859857687018,"endHours":22.139859857687018,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"22:08","end":"23:08","startHours":22.139859857687018,"endHours":23.139859857687018,"planetary_lord":"Moon"},{"name":"Hora 17","start":"23:08","end":"00:08","startHours":23.139859857687018,"endHours":24.139859857687018,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"00:08","end":"01:08","startHours":24.139859857687018,"endHours":25.139859857687018,"planetary_lord":"Venus"},{"name":"Hora 19","start":"01:08","end":"02:08","startHours":25.139859857687018,"endHours":26.139859857687018,"planetary_lord":"Sun"},{"name":"Hora 20","start":"02:08","end":"03:08","startHours":26.139859857687018,"endHours":27.139859857687018,"planetary_lord":"Mars"},{"name":"Hora 21","start":"03:08","end":"04:08","startHours":27.139859857687018,"endHours":28.139859857687018,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"04:08","end":"05:08","startHours":28.139859857687018,"endHours":29.139859857687018,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"05:08","end":"06:08","startHours":29.139859857687018,"endHours":30.139859857687018,"planetary_lord":"Moon"},{"name":"Hora 24","start":"06:08","end":"07:08","startHours":30.139859857687018,"endHours":31.139859857687018,"planetary_lord":"Mercury"}],"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","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"West","rahuVasa":"East","anandadiYoga":{"name":"Śrīvatsa","quality":"Auspicious"},"drikRitu":"Śiśira (Winter) (Drik)","vedicRitu":"Hemanta (Pre-winter)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":-17.41015306793003,"eotMinutes":-13.689348117395623,"ayanamsa":23.3513}},"calendars":{"vikram_samvat":2021,"vikram_samvatsara":"Piṅgala","saka_samvat":1886,"saka_samvatsara":"Krodhi","bengali_samvat":1371,"malayalam_era":1140,"nanakshahi_year":495,"lunar_month":"Māgha","lunar_month_paksha_full":"Māgha Kṛṣṇa Pakṣa","solar_month":"Makara (Tai)","ritu":"Śiśira (Winter)","display_summary":"Māgha Kṛṣṇa Caturthī · Vikram 2021 Piṅgala · Śaka 1886 Krodhi"},"festivals":[{"id":"makara-sankranti","name":"Makara Saṅkrānti (Uttarāyaṇa)","name_sanskrit":"मकर सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Capricorn; Uttarāyaṇa (north-going) begins. Bhīṣma's chosen mahaprasthāna time.","vrata":true,"detection":{"sun_rashi":"Makara"},"precedence":1,"sources":["Mahābhārata Bhīṣma-Stuti","Sūrya-Siddhānta"]},{"id":"pongal","name":"Pongal / Thai Pongal","name_sanskrit":"पोङ्गल","tradition":"Regional","associated_deity":"Sūrya Bhagavān","significance":"Tamil 4-day harvest festival; coincides with Makara Saṅkrānti.","vrata":false,"detection":{"sun_rashi":"Makara"},"precedence":2},{"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":"shani-walk","name":"Śani Walk","name_sanskrit":"शनि यात्रा","type":"graha","description":"Tapas + endurance + BG 17.14-19.","step_count":7,"url":"/walk/shani-walk"},"reason":"Śanivāra (Saturday) — 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 February 1, 1964 CE · Ṛṣikeśa · Vidhyamitra","description":"February 1, 1964 CE for Ṛṣikeśa: Kṛṣṇa Caturthī, sūryodaya 07:08, sūryāsta 17:53.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1964-02-01","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1964-02-01","sa":"https://sa.vidhyamitra.com/city/rishikesh/1964-02-01","hi":"https://hi.vidhyamitra.com/city/rishikesh/1964-02-01","x-default":"https://vidhyamitra.com/city/rishikesh/1964-02-01"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-20T06:07:27.136Z","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":"2026-05-20T06:07:27.136Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-20T06:07:27.136Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}