{"id":"vidhyamitra:city-day:rishikesh:1980-02-25:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/rishikesh/1980-02-25","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1980-02-25","date_display":"February 25, 1980 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":1980,"month":2,"day":25,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444294.770833,"kali_year":5081,"ahargana":1855829.2708,"sun":{"sidereal_longitude":312.202,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":64.1059,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":111.9039,"elapsed_within_tithi_degrees":3.9039},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":4,"moon_longitude":64.1059,"elapsed_within_degrees":10.7725},"yoga":{"number":2,"name":"Prīti","sum_longitude":16.3078},"karana":{"half_tithi_index":18,"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":1980,"month":2,"day":25,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444294.770833,"ahargana":1855829.2708,"kali_year":5081,"ayanamsa_lahiri":23.5757,"grahas":{"sun":{"sidereal_longitude":312.01722199999995,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":2},"retrograde":false},"moon":{"sidereal_longitude":66.57312200000001,"rashi":{"number":3,"name":"Mithuna"},"nakshatra":{"number":5,"name":"Mr̥gaśirā","pada":4},"retrograde":false,"latitude":-4.0819},"mars":{"sidereal_longitude":132.55762199999998,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":true},"mercury":{"sidereal_longitude":328.1906220000001,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":25,"name":"Pūrva Bhādrapadā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":131.46192199999996,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":4},"retrograde":true},"venus":{"sidereal_longitude":354.413022,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":27,"name":"Revatī","pada":3},"retrograde":false},"saturn":{"sidereal_longitude":151.29522199999997,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2},"retrograde":true},"rahu":{"sidereal_longitude":129.2344,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","pada":3},"retrograde":false},"ketu":{"sidereal_longitude":309.2344,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":24,"name":"Śatabhiṣā","pada":1},"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":1980,"month":2,"day":25,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444294.770833,"kali_year":5081,"ahargana":1855829.2708,"sun":{"sidereal_longitude":312.202,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":64.1059,"rashi":3,"rashi_name":"Mithuna"},"tithi":{"number":10,"name":"Daśamī","paksha":"Śukla","full_name":"Śukla Daśamī","elongation_degrees":111.9039,"elapsed_within_tithi_degrees":3.9039},"nakshatra":{"number":5,"name":"Mṛgaśīrṣā","pada":4,"moon_longitude":64.1059,"elapsed_within_degrees":10.7725},"yoga":{"number":2,"name":"Prīti","sum_longitude":16.3078},"karana":{"half_tithi_index":18,"name":"Taitila"},"vara":{"number":3,"name":"Somavāra (Monday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-4.082,"elongation":111.904},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-4.082,"opposition_distance":68.096}},"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":"06:49","sunsetLocal":"18:12","solarNoonLocal":"12:31","dayLengthHours":11.39202928593388,"dayLengthDisplay":"11 Hours 23 Mins 31 Secs","nightLengthDisplay":"12 Hours 36 Mins 29 Secs","moonriseLocal":"13:08","moonsetLocal":"03:10","rahuKala":{"name":"Rāhu Kāla","start":"08:14","end":"09:40","startHours":8.23851709669032,"endHours":9.662520757432054,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"11:05","end":"12:31","startHours":11.086524418173788,"endHours":12.510528078915524,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"13:56","end":"15:22","startHours":13.93453173965726,"endHours":15.358535400398994,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:28","end":"09:51","startHours":9.47265360266649,"endHours":9.852387912197619,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:17","end":"07:36","startHours":7.289181322862495,"endHours":7.592968770487398,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:08","end":"12:53","startHours":12.130793769384395,"endHours":12.890262388446653,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:18","end":"06:03","startHours":5.295576197824066,"endHours":6.055044816886325,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:52","end":"06:49","startHours":5.86517766212076,"endHours":6.814513435948584,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:25","end":"15:10","startHours":14.409199626571171,"endHours":15.16866824563343,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:00","end":"18:24","startHours":18.006542721882465,"endHours":18.406542721882463,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:12","end":"18:41","startHours":18.206542721882464,"endHours":18.681210608796377,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:57","end":"19:42","startHours":17.956542721882464,"endHours":19.706542721882464,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:08","end":"00:53","startHours":24.130793769384393,"endHours":24.890262388446654,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Amṛta","start":"06:49","end":"08:14","startHours":6.814513435948584,"endHours":8.23851709669032,"quality":"auspicious"},{"name":"Kāla","start":"08:14","end":"09:40","startHours":8.23851709669032,"endHours":9.662520757432054,"quality":"inauspicious"},{"name":"Śubha","start":"09:40","end":"11:05","startHours":9.662520757432054,"endHours":11.086524418173788,"quality":"auspicious"},{"name":"Roga","start":"11:05","end":"12:31","startHours":11.086524418173788,"endHours":12.510528078915524,"quality":"inauspicious"},{"name":"Udveg","start":"12:31","end":"13:56","startHours":12.510528078915524,"endHours":13.93453173965726,"quality":"inauspicious"},{"name":"Chala","start":"13:56","end":"15:22","startHours":13.93453173965726,"endHours":15.358535400398994,"quality":"neutral"},{"name":"Labha","start":"15:22","end":"16:47","startHours":15.358535400398994,"endHours":16.782539061140728,"quality":"auspicious"},{"name":"Amṛta","start":"16:47","end":"18:12","startHours":16.782539061140728,"endHours":18.206542721882464,"quality":"auspicious"}],"nightChoghadiyas":[{"name":"Chala","start":"18:12","end":"19:47","startHours":18.206542721882464,"endHours":19.782539061140728,"quality":"neutral"},{"name":"Labha","start":"19:47","end":"21:22","startHours":19.782539061140728,"endHours":21.358535400398992,"quality":"auspicious"},{"name":"Amṛta","start":"21:22","end":"22:56","startHours":21.358535400398992,"endHours":22.93453173965726,"quality":"auspicious"},{"name":"Kāla","start":"22:56","end":"00:31","startHours":22.93453173965726,"endHours":24.510528078915524,"quality":"inauspicious"},{"name":"Śubha","start":"00:31","end":"02:05","startHours":24.510528078915524,"endHours":26.086524418173788,"quality":"auspicious"},{"name":"Roga","start":"02:05","end":"03:40","startHours":26.086524418173788,"endHours":27.662520757432056,"quality":"inauspicious"},{"name":"Udveg","start":"03:40","end":"05:14","startHours":27.662520757432056,"endHours":29.23851709669032,"quality":"inauspicious"},{"name":"Chala","start":"05:14","end":"06:49","startHours":29.23851709669032,"endHours":30.814513435948584,"quality":"neutral"}],"horas":[{"name":"Hora 1","start":"06:49","end":"07:49","startHours":6.814513435948584,"endHours":7.814513435948584,"planetary_lord":"Moon"},{"name":"Hora 2","start":"07:49","end":"08:49","startHours":7.814513435948584,"endHours":8.814513435948584,"planetary_lord":"Mercury"},{"name":"Hora 3","start":"08:49","end":"09:49","startHours":8.814513435948584,"endHours":9.814513435948584,"planetary_lord":"Venus"},{"name":"Hora 4","start":"09:49","end":"10:49","startHours":9.814513435948584,"endHours":10.814513435948584,"planetary_lord":"Sun"},{"name":"Hora 5","start":"10:49","end":"11:49","startHours":10.814513435948584,"endHours":11.814513435948584,"planetary_lord":"Mars"},{"name":"Hora 6","start":"11:49","end":"12:49","startHours":11.814513435948584,"endHours":12.814513435948584,"planetary_lord":"Jupiter"},{"name":"Hora 7","start":"12:49","end":"13:49","startHours":12.814513435948584,"endHours":13.814513435948584,"planetary_lord":"Saturn"},{"name":"Hora 8","start":"13:49","end":"14:49","startHours":13.814513435948584,"endHours":14.814513435948584,"planetary_lord":"Moon"},{"name":"Hora 9","start":"14:49","end":"15:49","startHours":14.814513435948584,"endHours":15.814513435948584,"planetary_lord":"Mercury"},{"name":"Hora 10","start":"15:49","end":"16:49","startHours":15.814513435948584,"endHours":16.814513435948584,"planetary_lord":"Venus"},{"name":"Hora 11","start":"16:49","end":"17:49","startHours":16.814513435948584,"endHours":17.814513435948584,"planetary_lord":"Sun"},{"name":"Hora 12","start":"17:49","end":"18:49","startHours":17.814513435948584,"endHours":18.814513435948584,"planetary_lord":"Mars"},{"name":"Hora 13","start":"18:49","end":"19:49","startHours":18.814513435948584,"endHours":19.814513435948584,"planetary_lord":"Jupiter"},{"name":"Hora 14","start":"19:49","end":"20:49","startHours":19.814513435948584,"endHours":20.814513435948584,"planetary_lord":"Saturn"},{"name":"Hora 15","start":"20:49","end":"21:49","startHours":20.814513435948584,"endHours":21.814513435948584,"planetary_lord":"Moon"},{"name":"Hora 16","start":"21:49","end":"22:49","startHours":21.814513435948584,"endHours":22.814513435948584,"planetary_lord":"Mercury"},{"name":"Hora 17","start":"22:49","end":"23:49","startHours":22.814513435948584,"endHours":23.814513435948584,"planetary_lord":"Venus"},{"name":"Hora 18","start":"23:49","end":"00:49","startHours":23.814513435948584,"endHours":24.814513435948584,"planetary_lord":"Sun"},{"name":"Hora 19","start":"00:49","end":"01:49","startHours":24.814513435948584,"endHours":25.814513435948584,"planetary_lord":"Mars"},{"name":"Hora 20","start":"01:49","end":"02:49","startHours":25.814513435948584,"endHours":26.814513435948584,"planetary_lord":"Jupiter"},{"name":"Hora 21","start":"02:49","end":"03:49","startHours":26.814513435948584,"endHours":27.814513435948584,"planetary_lord":"Saturn"},{"name":"Hora 22","start":"03:49","end":"04:49","startHours":27.814513435948584,"endHours":28.814513435948584,"planetary_lord":"Moon"},{"name":"Hora 23","start":"04:49","end":"05:49","startHours":28.814513435948584,"endHours":29.814513435948584,"planetary_lord":"Mercury"},{"name":"Hora 24","start":"05:49","end":"06:49","startHours":29.814513435948584,"endHours":30.814513435948584,"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":["Meṣa","Mithuna","Siṃha","Vṛścika","Dhanu","Mīna"],"unfavorable_rashis":["Vṛṣabha","Karka","Kanyā","Tulā","Makara","Kumbha"]},"dishaShool":"East (Pūrva)","chandraVasa":"South","rahuVasa":"North-East","anandadiYoga":{"name":"Vajra","quality":"Inauspicious"},"tropicalRitu":"Śiśira (Winter) (tropical)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-9.459464281346321,"eotMinutes":-13.702084734931393,"ayanamsa":23.5757}},"calendars":{"vikram_samvat":2037,"vikram_samvatsara":"Śrīmukha","saka_samvat":1902,"saka_samvatsara":"Raudra","bengali_samvat":1387,"malayalam_era":1156,"nanakshahi_year":511,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Phālguna","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Kumbha (Māsi)","ritu":"Śiśira (Winter)","display_summary":"Phālguna Śukla Daśamī · Vikram 2037 Śrīmukha · Śaka 1902 Raudra"},"festivals":[],"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 February 25, 1980 CE · Ṛṣikeśa · Vidhyamitra","description":"February 25, 1980 CE for Ṛṣikeśa: Śukla Daśamī, sūryodaya 06:49, sūryāsta 18:12.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/rishikesh/1980-02-25","hreflang_alternates":{"en":"https://vidhyamitra.com/city/rishikesh/1980-02-25","sa":"https://sa.vidhyamitra.com/city/rishikesh/1980-02-25","hi":"https://hi.vidhyamitra.com/city/rishikesh/1980-02-25","x-default":"https://vidhyamitra.com/city/rishikesh/1980-02-25"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-05-31T19:41:24.444Z","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":"2026-05-31T19:41:24.444Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-05-31T19:41:24.444Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}