{"id":"vidhyamitra:city-day:rishikesh:1958-05-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1958-05-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1958-05-18","date_display":"May 18, 1958 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":1958,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2436341.770833,"kali_year":5060,"ahargana":1847876.2708,"sun":{"sidereal_longitude":33.3925,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":24.7379,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":351.3454,"elapsed_within_tithi_degrees":3.3454},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4,"moon_longitude":24.7379,"elapsed_within_degrees":11.4045},"yoga":{"number":5,"name":"Śobhana","sum_longitude":58.1304},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"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":1958,"month":5,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2436341.770833,"ahargana":1847876.2708,"kali_year":5060,"ayanamsa_lahiri":23.2715,"grahas":{"sun":{"sidereal_longitude":33.33088500000002,"rashi":{"number":2,"name":"Vṛṣabha"},"nakshatra":{"number":3,"name":"Kṛttikā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":24.91638499999999,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4},"retrograde":false,"latitude":-1.0964},"mars":{"sidereal_longitude":322.69058500000006,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":8.204385000000002,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":180.33718499999998,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":true},"venus":{"sidereal_longitude":351.251085,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":2},"retrograde":false},"saturn":{"sidereal_longitude":241.51588500000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":1},"retrograde":true},"rahu":{"sidereal_longitude":190.6226,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":10.6226,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":1,"name":"Aśvinī","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":1958,"month":5,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2436341.770833,"kali_year":5060,"ahargana":1847876.2708,"sun":{"sidereal_longitude":33.3925,"rashi":2,"rashi_name":"Vṛṣabha"},"moon":{"sidereal_longitude":24.7379,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":30,"name":"Amāvasyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Amāvasyā","elongation_degrees":351.3454,"elapsed_within_tithi_degrees":3.3454},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4,"moon_longitude":24.7379,"elapsed_within_degrees":11.4045},"yoga":{"number":5,"name":"Śobhana","sum_longitude":58.1304},"karana":{"half_tithi_index":58,"name":"Catuṣpāda"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-1.096,"elongation":8.655},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-1.096,"opposition_distance":171.345}},"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":"05:22","sunsetLocal":"19:04","solarNoonLocal":"12:13","dayLengthHours":13.7083966326712,"dayLengthDisplay":"13 Hours 42 Mins 30 Secs","nightLengthDisplay":"10 Hours 17 Mins 30 Secs","moonriseLocal":"04:55","moonsetLocal":"18:24","rahuKala":{"name":"Rāhu Kāla","start":"17:22","end":"19:04","startHours":17.36132236741054,"endHours":19.07487194649444,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:13","end":"13:56","startHours":12.220673630158842,"endHours":13.934223209242742,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:39","end":"17:22","startHours":15.647772788326641,"endHours":17.36132236741054,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"08:34","end":"09:01","startHours":8.565101194779855,"endHours":9.022047749202228,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"05:56","end":"06:18","startHours":5.937658506851208,"endHours":6.303215750389107,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:46","end":"12:41","startHours":11.763727075736467,"endHours":12.677620184581214,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"03:32","end":"04:27","startHours":3.5386890961337483,"endHours":4.452582204978495,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"04:13","end":"05:22","startHours":4.2241089277673085,"endHours":5.3664753138232415,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:30","end":"15:25","startHours":14.505406402270708,"endHours":15.419299511115454,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:52","end":"19:16","startHours":18.87487194649444,"endHours":19.27487194649444,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"19:04","end":"19:39","startHours":19.07487194649444,"endHours":19.646055139522407,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:49","end":"20:34","startHours":18.82487194649444,"endHours":20.57487194649444,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:46","end":"00:41","startHours":23.76372707573647,"endHours":24.677620184581215,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"05:22","end":"07:05","startHours":5.3664753138232415,"endHours":7.080024892907142,"quality":"inauspicious"},{"name":"Chala","start":"07:05","end":"08:48","startHours":7.080024892907142,"endHours":8.793574471991041,"quality":"neutral"},{"name":"Labha","start":"08:48","end":"10:30","startHours":8.793574471991041,"endHours":10.507124051074943,"quality":"auspicious"},{"name":"Amṛta","start":"10:30","end":"12:13","startHours":10.507124051074943,"endHours":12.220673630158842,"quality":"auspicious"},{"name":"Kāla","start":"12:13","end":"13:56","startHours":12.220673630158842,"endHours":13.934223209242742,"quality":"inauspicious"},{"name":"Śubha","start":"13:56","end":"15:39","startHours":13.934223209242742,"endHours":15.647772788326641,"quality":"auspicious"},{"name":"Roga","start":"15:39","end":"17:22","startHours":15.647772788326641,"endHours":17.36132236741054,"quality":"inauspicious"},{"name":"Udveg","start":"17:22","end":"19:04","startHours":17.36132236741054,"endHours":19.07487194649444,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"19:04","end":"20:22","startHours":19.07487194649444,"endHours":20.36132236741054,"quality":"auspicious"},{"name":"Roga","start":"20:22","end":"21:39","startHours":20.36132236741054,"endHours":21.64777278832664,"quality":"inauspicious"},{"name":"Udveg","start":"21:39","end":"22:56","startHours":21.64777278832664,"endHours":22.93422320924274,"quality":"inauspicious"},{"name":"Chala","start":"22:56","end":"00:13","startHours":22.93422320924274,"endHours":24.220673630158842,"quality":"neutral"},{"name":"Labha","start":"00:13","end":"01:30","startHours":24.220673630158842,"endHours":25.50712405107494,"quality":"auspicious"},{"name":"Amṛta","start":"01:30","end":"02:48","startHours":25.50712405107494,"endHours":26.79357447199104,"quality":"auspicious"},{"name":"Kāla","start":"02:48","end":"04:05","startHours":26.79357447199104,"endHours":28.08002489290714,"quality":"inauspicious"},{"name":"Śubha","start":"04:05","end":"05:22","startHours":28.08002489290714,"endHours":29.36647531382324,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"05:22","end":"06:22","startHours":5.3664753138232415,"endHours":6.3664753138232415,"planetary_lord":"Sun"},{"name":"Hora 2","start":"06:22","end":"07:22","startHours":6.3664753138232415,"endHours":7.3664753138232415,"planetary_lord":"Mars"},{"name":"Hora 3","start":"07:22","end":"08:22","startHours":7.3664753138232415,"endHours":8.36647531382324,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"08:22","end":"09:22","startHours":8.36647531382324,"endHours":9.36647531382324,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"09:22","end":"10:22","startHours":9.36647531382324,"endHours":10.36647531382324,"planetary_lord":"Moon"},{"name":"Hora 6","start":"10:22","end":"11:22","startHours":10.36647531382324,"endHours":11.36647531382324,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"11:22","end":"12:22","startHours":11.36647531382324,"endHours":12.36647531382324,"planetary_lord":"Venus"},{"name":"Hora 8","start":"12:22","end":"13:22","startHours":12.36647531382324,"endHours":13.36647531382324,"planetary_lord":"Sun"},{"name":"Hora 9","start":"13:22","end":"14:22","startHours":13.36647531382324,"endHours":14.36647531382324,"planetary_lord":"Mars"},{"name":"Hora 10","start":"14:22","end":"15:22","startHours":14.36647531382324,"endHours":15.36647531382324,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"15:22","end":"16:22","startHours":15.36647531382324,"endHours":16.36647531382324,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"16:22","end":"17:22","startHours":16.36647531382324,"endHours":17.36647531382324,"planetary_lord":"Moon"},{"name":"Hora 13","start":"17:22","end":"18:22","startHours":17.36647531382324,"endHours":18.36647531382324,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"18:22","end":"19:22","startHours":18.36647531382324,"endHours":19.36647531382324,"planetary_lord":"Venus"},{"name":"Hora 15","start":"19:22","end":"20:22","startHours":19.36647531382324,"endHours":20.36647531382324,"planetary_lord":"Sun"},{"name":"Hora 16","start":"20:22","end":"21:22","startHours":20.36647531382324,"endHours":21.36647531382324,"planetary_lord":"Mars"},{"name":"Hora 17","start":"21:22","end":"22:22","startHours":21.36647531382324,"endHours":22.36647531382324,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"22:22","end":"23:22","startHours":22.36647531382324,"endHours":23.36647531382324,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"23:22","end":"00:22","startHours":23.36647531382324,"endHours":24.36647531382324,"planetary_lord":"Moon"},{"name":"Hora 20","start":"00:22","end":"01:22","startHours":24.36647531382324,"endHours":25.36647531382324,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"01:22","end":"02:22","startHours":25.36647531382324,"endHours":26.36647531382324,"planetary_lord":"Venus"},{"name":"Hora 22","start":"02:22","end":"03:22","startHours":26.36647531382324,"endHours":27.36647531382324,"planetary_lord":"Sun"},{"name":"Hora 23","start":"03:22","end":"04:22","startHours":27.36647531382324,"endHours":28.36647531382324,"planetary_lord":"Mars"},{"name":"Hora 24","start":"04:22","end":"05:22","startHours":28.36647531382324,"endHours":29.36647531382324,"planetary_lord":"Jupiter"}],"taraBala":{"favorable_nakshatras":["Kṛttikā","Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Uttara Phalgunī","Hasta","Citrā","Svātī","Viśākhā","Uttara Āṣāḍhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Puṣya","Aśleṣā","Maghā","Pūrva Phalgunī","Anurādhā","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","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":"Kāladaṇḍa","quality":"Inauspicious"},"tropicalRitu":"Vasanta (Spring)","vedicRitu":"Vasanta (Spring)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":19.393565864408306,"eotMinutes":3.6891821904695723,"ayanamsa":23.2715}},"calendars":{"vikram_samvat":2015,"vikram_samvatsara":"Virodhakṛt","saka_samvat":1880,"saka_samvatsara":"Vilambī","bengali_samvat":1365,"malayalam_era":1134,"nanakshahi_year":489,"lunar_month":"Jyeṣṭha","lunar_month_paksha_full":"Jyeṣṭha Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Jyeṣṭha","lunar_month_amanta":"Vaiśākha","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Vṛṣabha (Vaikāsi)","ritu":"Grīṣma (Summer)","display_summary":"Jyeṣṭha Kṛṣṇa Amāvasyā · Vikram 2015 Virodhakṛt · Śaka 1880 Vilambī"},"festivals":[{"id":"vat-savitri-amavasya","name":"Vaṭa Sāvitrī Amāvasyā","name_sanskrit":"वट सावित्री अमावस्या","tradition":"Pan-Hindu","associated_deity":"Sāvitrī Devī","significance":"Sāvitrī's redemption of Satyavān from Yama; pati-vrata observance.","vrata":true,"detection":{"tithi_number":30,"tithi_paksha":"Kṛṣṇa","lunar_month":"Jyeṣṭha"},"precedence":2,"sources":["Mahābhārata, Vana Parva — Sāvitrī Upākhyāna"]}],"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":"-3137-10-20","event":"Karṇa-Vadha (Mahābhārata Day 17)","chart_id":"karna","shared_marker":"same Kṛṣṇa Amāvasyā","url":"/day/-3137-10-20","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 May 18, 1958 CE · Ṛṣikeśa · Vidhyamitra","description":"May 18, 1958 CE for Ṛṣikeśa: Kṛṣṇa Amāvasyā, sūryodaya 05:22, sūryāsta 19:04.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1958-05-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1958-05-18","sa":"https://sa.vidhyamitra.com/city/rishikesh/1958-05-18","hi":"https://hi.vidhyamitra.com/city/rishikesh/1958-05-18","x-default":"https://vidhyamitra.com/city/rishikesh/1958-05-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T03:24:31.707Z","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":"2026-05-31T03:24:31.707Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T03:24:31.707Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}