{"id":"vidhyamitra:city-day:rishikesh:2171-12-30:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/2171-12-30","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2171-12-30","date_display":"December 30, 2171 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":2171,"month":12,"day":30,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514364.770833,"kali_year":5273,"ahargana":1925899.2708,"sun":{"sidereal_longitude":251.1941,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":292.3762,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":41.1822,"elapsed_within_tithi_degrees":5.1822},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4,"moon_longitude":292.3762,"elapsed_within_degrees":12.3762},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":183.5703},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"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":2171,"month":12,"day":30,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2514364.770833,"ahargana":1925899.2708,"kali_year":5273,"ayanamsa_lahiri":26.2556,"grahas":{"sun":{"sidereal_longitude":251.878333,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"moon":{"sidereal_longitude":293.97643300000004,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":1},"retrograde":false,"latitude":-4.477},"mars":{"sidereal_longitude":164.99673299999995,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":250.93793300000004,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":19,"name":"Mūla","pada":4},"retrograde":false},"jupiter":{"sidereal_longitude":194.67333299999996,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":3},"retrograde":false},"venus":{"sidereal_longitude":292.402733,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":315.661833,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":16.5886,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":1},"retrograde":false},"ketu":{"sidereal_longitude":196.5886,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","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":2171,"month":12,"day":30,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2514364.770833,"kali_year":5273,"ahargana":1925899.2708,"sun":{"sidereal_longitude":251.1941,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":292.3762,"rashi":10,"rashi_name":"Makara"},"tithi":{"number":4,"name":"Caturthī","paksha":"Śukla","full_name":"Śukla Caturthī","elongation_degrees":41.1822,"elapsed_within_tithi_degrees":5.1822},"nakshatra":{"number":22,"name":"Śravaṇa","pada":4,"moon_longitude":292.3762,"elapsed_within_degrees":12.3762},"yoga":{"number":14,"name":"Harṣaṇa","sum_longitude":183.5703},"karana":{"half_tithi_index":6,"name":"Vaṇija"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.477,"elongation":41.182},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.477,"opposition_distance":138.818}},"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":"07:13","sunsetLocal":"17:27","solarNoonLocal":"12:20","dayLengthHours":10.227961931703696,"dayLengthDisplay":"10 Hours 13 Mins 41 Secs","nightLengthDisplay":"13 Hours 46 Mins 19 Secs","moonriseLocal":"09:40","moonsetLocal":"20:36","rahuKala":{"name":"Rāhu Kāla","start":"08:30","end":"09:46","startHours":8.49339585061565,"endHours":9.771891092078612,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:03","end":"12:20","startHours":11.050386333541574,"endHours":12.328881575004537,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:36","end":"14:53","startHours":13.607376816467498,"endHours":14.88587205793046,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:36","end":"09:57","startHours":9.601425059883551,"endHours":9.942357124273673,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:38","end":"07:55","startHours":7.641065689640342,"endHours":7.913811341152441,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"11:59","end":"12:40","startHours":11.987949510614413,"endHours":12.669813639394661,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:51","end":"06:32","startHours":5.851172351592195,"endHours":6.533036480372442,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:22","end":"07:13","startHours":6.36257044817738,"endHours":7.214900609152688,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:02","end":"14:43","startHours":14.033541896955153,"endHours":14.7154060257354,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:15","end":"17:39","startHours":17.242862540856386,"endHours":17.642862540856385,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:27","end":"17:52","startHours":17.442862540856385,"endHours":17.86902762134404,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:12","end":"18:57","startHours":17.192862540856385,"endHours":18.942862540856385,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"23:59","end":"00:40","startHours":23.987949510614413,"endHours":24.66981363939466,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"07:13","end":"08:30","startHours":7.214900609152688,"endHours":8.49339585061565,"quality":"auspicious"},{"name":"Kāla","start":"08:30","end":"09:46","startHours":8.49339585061565,"endHours":9.771891092078612,"quality":"inauspicious"},{"name":"Śubha","start":"09:46","end":"11:03","startHours":9.771891092078612,"endHours":11.050386333541574,"quality":"auspicious"},{"name":"Roga","start":"11:03","end":"12:20","startHours":11.050386333541574,"endHours":12.328881575004537,"quality":"inauspicious"},{"name":"Udveg","start":"12:20","end":"13:36","startHours":12.328881575004537,"endHours":13.607376816467498,"quality":"inauspicious"},{"name":"Chala","start":"13:36","end":"14:53","startHours":13.607376816467498,"endHours":14.88587205793046,"quality":"neutral"},{"name":"Labha","start":"14:53","end":"16:10","startHours":14.88587205793046,"endHours":16.164367299393422,"quality":"auspicious"},{"name":"Amṛta","start":"16:10","end":"17:27","startHours":16.164367299393422,"endHours":17.442862540856385,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"17:27","end":"19:10","startHours":17.442862540856385,"endHours":19.164367299393422,"quality":"neutral"},{"name":"Labha","start":"19:10","end":"20:53","startHours":19.164367299393422,"endHours":20.885872057930463,"quality":"auspicious"},{"name":"Amṛta","start":"20:53","end":"22:36","startHours":20.885872057930463,"endHours":22.6073768164675,"quality":"auspicious"},{"name":"Kāla","start":"22:36","end":"00:20","startHours":22.6073768164675,"endHours":24.328881575004537,"quality":"inauspicious"},{"name":"Śubha","start":"00:20","end":"02:03","startHours":24.328881575004537,"endHours":26.050386333541574,"quality":"auspicious"},{"name":"Roga","start":"02:03","end":"03:46","startHours":26.050386333541574,"endHours":27.77189109207861,"quality":"inauspicious"},{"name":"Udveg","start":"03:46","end":"05:30","startHours":27.77189109207861,"endHours":29.493395850615652,"quality":"inauspicious"},{"name":"Chala","start":"05:30","end":"07:13","startHours":29.493395850615652,"endHours":31.21490060915269,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"07:13","end":"08:13","startHours":7.214900609152688,"endHours":8.21490060915269,"planetary_lord":"Moon"},{"name":"Hora 2","start":"08:13","end":"09:13","startHours":8.21490060915269,"endHours":9.21490060915269,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"09:13","end":"10:13","startHours":9.21490060915269,"endHours":10.21490060915269,"planetary_lord":"Venus"},{"name":"Hora 4","start":"10:13","end":"11:13","startHours":10.21490060915269,"endHours":11.21490060915269,"planetary_lord":"Sun"},{"name":"Hora 5","start":"11:13","end":"12:13","startHours":11.21490060915269,"endHours":12.21490060915269,"planetary_lord":"Mars"},{"name":"Hora 6","start":"12:13","end":"13:13","startHours":12.21490060915269,"endHours":13.21490060915269,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"13:13","end":"14:13","startHours":13.21490060915269,"endHours":14.21490060915269,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"14:13","end":"15:13","startHours":14.21490060915269,"endHours":15.21490060915269,"planetary_lord":"Moon"},{"name":"Hora 9","start":"15:13","end":"16:13","startHours":15.21490060915269,"endHours":16.21490060915269,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"16:13","end":"17:13","startHours":16.21490060915269,"endHours":17.21490060915269,"planetary_lord":"Venus"},{"name":"Hora 11","start":"17:13","end":"18:13","startHours":17.21490060915269,"endHours":18.21490060915269,"planetary_lord":"Sun"},{"name":"Hora 12","start":"18:13","end":"19:13","startHours":18.21490060915269,"endHours":19.21490060915269,"planetary_lord":"Mars"},{"name":"Hora 13","start":"19:13","end":"20:13","startHours":19.21490060915269,"endHours":20.21490060915269,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"20:13","end":"21:13","startHours":20.21490060915269,"endHours":21.21490060915269,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"21:13","end":"22:13","startHours":21.21490060915269,"endHours":22.21490060915269,"planetary_lord":"Moon"},{"name":"Hora 16","start":"22:13","end":"23:13","startHours":22.21490060915269,"endHours":23.21490060915269,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"23:13","end":"00:13","startHours":23.21490060915269,"endHours":24.21490060915269,"planetary_lord":"Venus"},{"name":"Hora 18","start":"00:13","end":"01:13","startHours":24.21490060915269,"endHours":25.21490060915269,"planetary_lord":"Sun"},{"name":"Hora 19","start":"01:13","end":"02:13","startHours":25.21490060915269,"endHours":26.21490060915269,"planetary_lord":"Mars"},{"name":"Hora 20","start":"02:13","end":"03:13","startHours":26.21490060915269,"endHours":27.21490060915269,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"03:13","end":"04:13","startHours":27.21490060915269,"endHours":28.21490060915269,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"04:13","end":"05:13","startHours":28.21490060915269,"endHours":29.21490060915269,"planetary_lord":"Moon"},{"name":"Hora 23","start":"05:13","end":"06:13","startHours":29.21490060915269,"endHours":30.21490060915269,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"06:13","end":"07:13","startHours":30.21490060915269,"endHours":31.21490060915269,"planetary_lord":"Venus"}],"taraBala":{"favorable_nakshatras":["Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Aśleṣā","Citrā","Svātī","Viśākhā","Anurādhā","Jyeṣṭhā","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā","Revatī"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Rohiṇī","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Hasta","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Śravaṇa"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Mithuna","Karka","Tulā","Vṛścika","Makara","Mīna"],"unfavorable_rashis":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Dhanu","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South-East","rahuVasa":"North-East","anandadiYoga":{"name":"Cara","quality":"Auspicious"},"tropicalRitu":"Hemanta (Pre-winter) (tropical)","vedicRitu":"Hemanta (Pre-winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-23.186871151610113,"eotMinutes":-2.803294500272213,"ayanamsa":26.2556}},"calendars":{"vikram_samvat":2228,"vikram_samvatsara":"Tāraṇa","saka_samvat":2093,"saka_samvatsara":"Prajāpati","bengali_samvat":1578,"malayalam_era":1347,"nanakshahi_year":702,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Pauṣa","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Dhanus (Mārgaḻi)","ritu":"Hemanta (Pre-winter)","display_summary":"Pauṣa Śukla Caturthī · Vikram 2228 Tāraṇa · Śaka 2093 Prajāpati"},"festivals":[{"id":"vinayaka-chaturthi","name":"Vināyaka Caturthī (monthly)","name_sanskrit":"विनायक चतुर्थी","tradition":"Pan-Hindu","associated_deity":"Gaṇeśa","significance":"Monthly Śukla-pakṣa Caturthī; auspicious for new ventures.","vrata":true,"detection":{"tithi_number":4,"tithi_paksha":"Śukla"},"precedence":6}],"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 December 30, 2171 CE · Ṛṣikeśa · Vidhyamitra","description":"December 30, 2171 CE for Ṛṣikeśa: Śukla Caturthī, sūryodaya 07:13, sūryāsta 17:27.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/2171-12-30","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/2171-12-30","sa":"https://sa.vidhyamitra.com/city/rishikesh/2171-12-30","hi":"https://hi.vidhyamitra.com/city/rishikesh/2171-12-30","x-default":"https://vidhyamitra.com/city/rishikesh/2171-12-30"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T14:43:51.093Z","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":"2026-05-31T14:43:51.093Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T14:43:51.093Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}