{"id":"vidhyamitra:city-day:rishikesh:1981-05-02:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1981-05-02","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-05-02","date_display":"May 2, 1981 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":1981,"month":5,"day":2,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444726.770833,"kali_year":5083,"ahargana":1856261.2708,"sun":{"sidereal_longitude":18.0662,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":349.0262,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":330.96,"elapsed_within_tithi_degrees":6.96},"nakshatra":{"number":27,"name":"Revatī","pada":1,"moon_longitude":349.0262,"elapsed_within_degrees":2.3595},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":7.0924},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"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":1981,"month":5,"day":2,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444726.770833,"ahargana":1856261.2708,"kali_year":5083,"ayanamsa_lahiri":23.5922,"grahas":{"sun":{"sidereal_longitude":17.967917,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":2},"retrograde":false},"moon":{"sidereal_longitude":347.570117,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":1},"retrograde":false,"latitude":-3.9972},"mars":{"sidereal_longitude":11.694517000000019,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":23.26421700000003,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":157.979417,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":4},"retrograde":true},"venus":{"sidereal_longitude":24.641916999999978,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":160.12271699999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":106.3449,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":8,"name":"Puṣya","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":286.3449,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"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":1981,"month":5,"day":2,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444726.770833,"kali_year":5083,"ahargana":1856261.2708,"sun":{"sidereal_longitude":18.0662,"rashi":1,"rashi_name":"Meṣa"},"moon":{"sidereal_longitude":349.0262,"rashi":12,"rashi_name":"Mīna"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":330.96,"elapsed_within_tithi_degrees":6.96},"nakshatra":{"number":27,"name":"Revatī","pada":1,"moon_longitude":349.0262,"elapsed_within_degrees":2.3595},"yoga":{"number":1,"name":"Viṣkambha","sum_longitude":7.0924},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-3.997,"elongation":29.04},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-3.997,"opposition_distance":150.96}},"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":"05:33","sunsetLocal":"18:54","solarNoonLocal":"12:14","dayLengthHours":13.350869059700102,"dayLengthDisplay":"13 Hours 21 Mins 03 Secs","nightLengthDisplay":"10 Hours 38 Mins 57 Secs","moonriseLocal":"03:59","moonsetLocal":"16:25","rahuKala":{"name":"Rāhu Kāla","start":"08:54","end":"10:34","startHours":8.893758075288964,"endHours":10.562616707751477,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"13:54","end":"15:34","startHours":13.900333972676503,"endHours":15.569192605139015,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"05:33","end":"07:13","startHours":5.556040810363938,"endHours":7.224899442826451,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:40","end":"09:07","startHours":8.671243590960628,"endHours":9.116272559617299,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"06:07","end":"06:28","startHours":6.112327021184775,"endHours":6.468350196110111,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:47","end":"12:41","startHours":11.78644637155732,"endHours":12.67650430887066,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:47","end":"04:40","startHours":3.7759249357372577,"endHours":4.665982873050598,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:27","end":"05:33","startHours":4.443468388722263,"endHours":5.556040810363938,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:27","end":"15:21","startHours":14.45662018349734,"endHours":15.34667812081068,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:42","end":"19:06","startHours":18.70690987006404,"endHours":19.10690987006404,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:54","end":"19:28","startHours":18.90690987006404,"endHours":19.463196080884877,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:39","end":"20:24","startHours":18.65690987006404,"endHours":20.40690987006404,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:47","end":"00:41","startHours":23.78644637155732,"endHours":24.67650430887066,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"05:33","end":"07:13","startHours":5.556040810363938,"endHours":7.224899442826451,"quality":"inauspicious"},{"name":"Śubha","start":"07:13","end":"08:54","startHours":7.224899442826451,"endHours":8.893758075288964,"quality":"auspicious"},{"name":"Roga","start":"08:54","end":"10:34","startHours":8.893758075288964,"endHours":10.562616707751477,"quality":"inauspicious"},{"name":"Udveg","start":"10:34","end":"12:14","startHours":10.562616707751477,"endHours":12.23147534021399,"quality":"inauspicious"},{"name":"Chala","start":"12:14","end":"13:54","startHours":12.23147534021399,"endHours":13.900333972676503,"quality":"neutral"},{"name":"Labha","start":"13:54","end":"15:34","startHours":13.900333972676503,"endHours":15.569192605139015,"quality":"auspicious"},{"name":"Amṛta","start":"15:34","end":"17:14","startHours":15.569192605139015,"endHours":17.23805123760153,"quality":"auspicious"},{"name":"Kāla","start":"17:14","end":"18:54","startHours":17.23805123760153,"endHours":18.90690987006404,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:54","end":"20:14","startHours":18.90690987006404,"endHours":20.23805123760153,"quality":"auspicious"},{"name":"Amṛta","start":"20:14","end":"21:34","startHours":20.23805123760153,"endHours":21.569192605139015,"quality":"auspicious"},{"name":"Kāla","start":"21:34","end":"22:54","startHours":21.569192605139015,"endHours":22.900333972676503,"quality":"inauspicious"},{"name":"Śubha","start":"22:54","end":"00:14","startHours":22.900333972676503,"endHours":24.23147534021399,"quality":"auspicious"},{"name":"Roga","start":"00:14","end":"01:34","startHours":24.23147534021399,"endHours":25.562616707751477,"quality":"inauspicious"},{"name":"Udveg","start":"01:34","end":"02:54","startHours":25.562616707751477,"endHours":26.893758075288964,"quality":"inauspicious"},{"name":"Chala","start":"02:54","end":"04:13","startHours":26.893758075288964,"endHours":28.22489944282645,"quality":"neutral"},{"name":"Labha","start":"04:13","end":"05:33","startHours":28.22489944282645,"endHours":29.55604081036394,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:33","end":"06:33","startHours":5.556040810363938,"endHours":6.556040810363938,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"06:33","end":"07:33","startHours":6.556040810363938,"endHours":7.556040810363938,"planetary_lord":"Moon"},{"name":"Hora 3","start":"07:33","end":"08:33","startHours":7.556040810363938,"endHours":8.556040810363939,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"08:33","end":"09:33","startHours":8.556040810363939,"endHours":9.556040810363939,"planetary_lord":"Venus"},{"name":"Hora 5","start":"09:33","end":"10:33","startHours":9.556040810363939,"endHours":10.556040810363939,"planetary_lord":"Sun"},{"name":"Hora 6","start":"10:33","end":"11:33","startHours":10.556040810363939,"endHours":11.556040810363939,"planetary_lord":"Mars"},{"name":"Hora 7","start":"11:33","end":"12:33","startHours":11.556040810363939,"endHours":12.556040810363939,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"12:33","end":"13:33","startHours":12.556040810363939,"endHours":13.556040810363939,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"13:33","end":"14:33","startHours":13.556040810363939,"endHours":14.556040810363939,"planetary_lord":"Moon"},{"name":"Hora 10","start":"14:33","end":"15:33","startHours":14.556040810363939,"endHours":15.556040810363939,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"15:33","end":"16:33","startHours":15.556040810363939,"endHours":16.55604081036394,"planetary_lord":"Venus"},{"name":"Hora 12","start":"16:33","end":"17:33","startHours":16.55604081036394,"endHours":17.55604081036394,"planetary_lord":"Sun"},{"name":"Hora 13","start":"17:33","end":"18:33","startHours":17.55604081036394,"endHours":18.55604081036394,"planetary_lord":"Mars"},{"name":"Hora 14","start":"18:33","end":"19:33","startHours":18.55604081036394,"endHours":19.55604081036394,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"19:33","end":"20:33","startHours":19.55604081036394,"endHours":20.55604081036394,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"20:33","end":"21:33","startHours":20.55604081036394,"endHours":21.55604081036394,"planetary_lord":"Moon"},{"name":"Hora 17","start":"21:33","end":"22:33","startHours":21.55604081036394,"endHours":22.55604081036394,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"22:33","end":"23:33","startHours":22.55604081036394,"endHours":23.55604081036394,"planetary_lord":"Venus"},{"name":"Hora 19","start":"23:33","end":"00:33","startHours":23.55604081036394,"endHours":24.55604081036394,"planetary_lord":"Sun"},{"name":"Hora 20","start":"00:33","end":"01:33","startHours":24.55604081036394,"endHours":25.55604081036394,"planetary_lord":"Mars"},{"name":"Hora 21","start":"01:33","end":"02:33","startHours":25.55604081036394,"endHours":26.55604081036394,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"02:33","end":"03:33","startHours":26.55604081036394,"endHours":27.55604081036394,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"03:33","end":"04:33","startHours":27.55604081036394,"endHours":28.55604081036394,"planetary_lord":"Moon"},{"name":"Hora 24","start":"04:33","end":"05:33","startHours":28.55604081036394,"endHours":29.55604081036394,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Mṛgaśirā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Citrā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā"],"unfavorable_nakshatras":["Ārdrā","Punarvasu","Puṣya","Aśleṣā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Siṃha","Kanyā","Dhanu","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Mithuna","Karka","Tulā","Vṛścika","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-West","rahuVasa":"East","anandadiYoga":{"name":"Gada","quality":"Inauspicious"},"drikRitu":"Vasanta (Spring) (Drik)","vedicRitu":"Vasanta (Spring)","drikAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization (Drikpanchang-parity)","declination":15.299100621072188,"eotMinutes":3.041079587160539,"ayanamsa":23.5922}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Vaiśākha","lunar_month_paksha_full":"Vaiśākha Kṛṣṇa Pakṣa","solar_month":"Mēsha (Cittirai / Vaiśākhī)","ritu":"Vasanta (Spring)","display_summary":"Vaiśākha Kṛṣṇa Trayodaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"id":"mesha-sankranti","name":"Meṣa Saṅkrānti (Vaiśākhī / Vishu / Pohelā Boishākh / Bihu)","name_sanskrit":"मेष सङ्क्रान्ति","tradition":"Pan-Hindu","associated_deity":"Sūrya Bhagavān","significance":"Sun enters Aries; solar new year. Regional: Vaiśākhī (Punjab) · Vishu (Kerala) · Pohelā Boishākh (Bengal) · Bihu (Assam) · Tamil Puthāṇḍu.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":1},{"id":"baisakhi","name":"Baisakhi (Vaiśākhī)","name_sanskrit":"वैशाखी","tradition":"Regional","associated_deity":"Sūrya + Khalsa Pantha (Sikh)","significance":"Punjab New Year + Sikh Khalsa founding day.","vrata":false,"detection":{"sun_rashi":"Meṣa"},"precedence":2},{"id":"pradosha-vrata","name":"Pradoṣa Vrata","name_sanskrit":"प्रदोष व्रत","tradition":"Shaiva","associated_deity":"Śiva","significance":"Twilight worship of Śiva on Trayodaśī.","vrata":true,"detection":{"any_of":[{"tithi_number":13},{"tithi_number":28}]},"precedence":7}],"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 May 2, 1981 CE · Ṛṣikeśa · Vidhyamitra","description":"May 2, 1981 CE for Ṛṣikeśa: Kṛṣṇa Trayodaśī, sūryodaya 05:33, sūryāsta 18:54.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1981-05-02","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1981-05-02","sa":"https://sa.vidhyamitra.com/city/rishikesh/1981-05-02","hi":"https://hi.vidhyamitra.com/city/rishikesh/1981-05-02","x-default":"https://vidhyamitra.com/city/rishikesh/1981-05-02"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-18T17:18:14.803Z","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":"2026-05-18T17:18:14.803Z","verification":{"type":"community-validated","markers":["matches Drikpanchang ±1 minute on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-18T17:18:14.803Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}