{"id":"vidhyamitra:city-day:shimla:1981-01-04:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/shimla/1981-01-04","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1981-01-04","date_display":"January 4, 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":1,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444608.770833,"kali_year":5082,"ahargana":1856143.2708,"sun":{"sidereal_longitude":259.853,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":232.1799,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":332.3269,"elapsed_within_tithi_degrees":8.3269},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2,"moon_longitude":232.1799,"elapsed_within_degrees":5.5132},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":132.0329},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"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":1981,"month":1,"day":4,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2444608.770833,"ahargana":1856143.2708,"kali_year":5082,"ayanamsa_lahiri":23.5877,"grahas":{"sun":{"sidereal_longitude":260.01232500000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":233.53432500000008,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":3},"retrograde":false,"latitude":3.9124},"mars":{"sidereal_longitude":279.95662500000003,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":21,"name":"Uttara Āṣāḍhā","pada":4},"retrograde":false},"mercury":{"sidereal_longitude":262.485625,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":3},"retrograde":false},"jupiter":{"sidereal_longitude":166.17022500000007,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"venus":{"sidereal_longitude":237.62602500000003,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":4},"retrograde":false},"saturn":{"sidereal_longitude":165.76222499999994,"rashi":{"number":6,"name":"Kanyā"},"nakshatra":{"number":13,"name":"Hasta","pada":2},"retrograde":false},"rahu":{"sidereal_longitude":112.5971,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Āśleṣā","pada":2},"retrograde":false},"ketu":{"sidereal_longitude":292.5971,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","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":1981,"month":1,"day":4,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2444608.770833,"kali_year":5082,"ahargana":1856143.2708,"sun":{"sidereal_longitude":259.853,"rashi":9,"rashi_name":"Dhanu"},"moon":{"sidereal_longitude":232.1799,"rashi":8,"rashi_name":"Vṛścika"},"tithi":{"number":28,"name":"Trayodaśī","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Trayodaśī","elongation_degrees":332.3269,"elapsed_within_tithi_degrees":8.3269},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2,"moon_longitude":232.1799,"elapsed_within_degrees":5.5132},"yoga":{"number":10,"name":"Gaṇḍa","sum_longitude":132.0329},"karana":{"half_tithi_index":55,"name":"Vaṇija"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":3.912,"elongation":27.673},"lunar":{"type":"lunar","occurs":false,"moon_latitude":3.912,"opposition_distance":152.327}},"eclipse_window_40days":[{"offset_days":16,"type":"lunar","occurs":true,"moon_latitude":-1.332,"opposition_distance":1.776}]},"city":{"slug":"shimla","name":"Shimla, Himachal Pradesh","lat":31.1048,"lon":77.1734,"tz_offset_hours":5.5,"state":"Himachal Pradesh","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"shimla","name":"Shimla, Himachal Pradesh","lat":31.1048,"lon":77.1734,"tz_offset_hours":5.5,"state":"Himachal Pradesh","country":"IN","tier":"tier-1"},"sunriseLocal":"07:21","sunsetLocal":"17:32","solarNoonLocal":"12:26","dayLengthHours":10.191746247456344,"dayLengthDisplay":"10 Hours 11 Mins 30 Secs","nightLengthDisplay":"13 Hours 48 Mins 30 Secs","moonriseLocal":"05:36","moonsetLocal":"15:45","rahuKala":{"name":"Rāhu Kāla","start":"16:16","end":"17:32","startHours":16.2607432905519,"endHours":17.534711571483943,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:26","end":"13:43","startHours":12.43883844775577,"endHours":13.712806728687813,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"14:59","end":"16:16","startHours":14.986775009619857,"endHours":16.2607432905519,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:43","end":"10:04","startHours":9.72103944843408,"endHours":10.060764323349291,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:46","end":"08:02","startHours":7.767621417671613,"endHours":8.039401317603781,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:06","end":"12:47","startHours":12.09911357284056,"endHours":12.778563322670982,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:59","end":"06:40","startHours":5.984065824366753,"endHours":6.663515574197176,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:30","end":"07:21","startHours":6.49365313673957,"endHours":7.342965324027599,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:08","end":"14:49","startHours":14.137462822331829,"endHours":14.816912572162252,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"17:20","end":"17:44","startHours":17.334711571483943,"endHours":17.734711571483942,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"17:32","end":"17:58","startHours":17.534711571483943,"endHours":17.959367665127957,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"17:17","end":"19:02","startHours":17.284711571483943,"endHours":19.034711571483943,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:06","end":"00:47","startHours":24.099113572840558,"endHours":24.778563322670983,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"07:21","end":"08:37","startHours":7.342965324027599,"endHours":8.616933604959641,"quality":"inauspicious"},{"name":"Chala","start":"08:37","end":"09:53","startHours":8.616933604959641,"endHours":9.890901885891685,"quality":"neutral"},{"name":"Labha","start":"09:53","end":"11:10","startHours":9.890901885891685,"endHours":11.164870166823729,"quality":"auspicious"},{"name":"Amṛta","start":"11:10","end":"12:26","startHours":11.164870166823729,"endHours":12.43883844775577,"quality":"auspicious"},{"name":"Kāla","start":"12:26","end":"13:43","startHours":12.43883844775577,"endHours":13.712806728687813,"quality":"inauspicious"},{"name":"Śubha","start":"13:43","end":"14:59","startHours":13.712806728687813,"endHours":14.986775009619857,"quality":"auspicious"},{"name":"Roga","start":"14:59","end":"16:16","startHours":14.986775009619857,"endHours":16.2607432905519,"quality":"inauspicious"},{"name":"Udveg","start":"16:16","end":"17:32","startHours":16.2607432905519,"endHours":17.534711571483943,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"17:32","end":"19:16","startHours":17.534711571483943,"endHours":19.2607432905519,"quality":"auspicious"},{"name":"Roga","start":"19:16","end":"20:59","startHours":19.2607432905519,"endHours":20.986775009619855,"quality":"inauspicious"},{"name":"Udveg","start":"20:59","end":"22:43","startHours":20.986775009619855,"endHours":22.712806728687813,"quality":"inauspicious"},{"name":"Chala","start":"22:43","end":"00:26","startHours":22.712806728687813,"endHours":24.43883844775577,"quality":"neutral"},{"name":"Labha","start":"00:26","end":"02:10","startHours":24.43883844775577,"endHours":26.16487016682373,"quality":"auspicious"},{"name":"Amṛta","start":"02:10","end":"03:53","startHours":26.16487016682373,"endHours":27.890901885891687,"quality":"auspicious"},{"name":"Kāla","start":"03:53","end":"05:37","startHours":27.890901885891687,"endHours":29.61693360495964,"quality":"inauspicious"},{"name":"Śubha","start":"05:37","end":"07:21","startHours":29.61693360495964,"endHours":31.3429653240276,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:21","end":"08:21","startHours":7.342965324027599,"endHours":8.342965324027599,"planetary_lord":"Sun"},{"name":"Hora 2","start":"08:21","end":"09:21","startHours":8.342965324027599,"endHours":9.342965324027599,"planetary_lord":"Mars"},{"name":"Hora 3","start":"09:21","end":"10:21","startHours":9.342965324027599,"endHours":10.342965324027599,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"10:21","end":"11:21","startHours":10.342965324027599,"endHours":11.342965324027599,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"11:21","end":"12:21","startHours":11.342965324027599,"endHours":12.342965324027599,"planetary_lord":"Moon"},{"name":"Hora 6","start":"12:21","end":"13:21","startHours":12.342965324027599,"endHours":13.342965324027599,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"13:21","end":"14:21","startHours":13.342965324027599,"endHours":14.342965324027599,"planetary_lord":"Venus"},{"name":"Hora 8","start":"14:21","end":"15:21","startHours":14.342965324027599,"endHours":15.342965324027599,"planetary_lord":"Sun"},{"name":"Hora 9","start":"15:21","end":"16:21","startHours":15.342965324027599,"endHours":16.3429653240276,"planetary_lord":"Mars"},{"name":"Hora 10","start":"16:21","end":"17:21","startHours":16.3429653240276,"endHours":17.3429653240276,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"17:21","end":"18:21","startHours":17.3429653240276,"endHours":18.3429653240276,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"18:21","end":"19:21","startHours":18.3429653240276,"endHours":19.3429653240276,"planetary_lord":"Moon"},{"name":"Hora 13","start":"19:21","end":"20:21","startHours":19.3429653240276,"endHours":20.3429653240276,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"20:21","end":"21:21","startHours":20.3429653240276,"endHours":21.3429653240276,"planetary_lord":"Venus"},{"name":"Hora 15","start":"21:21","end":"22:21","startHours":21.3429653240276,"endHours":22.3429653240276,"planetary_lord":"Sun"},{"name":"Hora 16","start":"22:21","end":"23:21","startHours":22.3429653240276,"endHours":23.3429653240276,"planetary_lord":"Mars"},{"name":"Hora 17","start":"23:21","end":"00:21","startHours":23.3429653240276,"endHours":24.3429653240276,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"00:21","end":"01:21","startHours":24.3429653240276,"endHours":25.3429653240276,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"01:21","end":"02:21","startHours":25.3429653240276,"endHours":26.3429653240276,"planetary_lord":"Moon"},{"name":"Hora 20","start":"02:21","end":"03:21","startHours":26.3429653240276,"endHours":27.3429653240276,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"03:21","end":"04:21","startHours":27.3429653240276,"endHours":28.3429653240276,"planetary_lord":"Venus"},{"name":"Hora 22","start":"04:21","end":"05:21","startHours":28.3429653240276,"endHours":29.3429653240276,"planetary_lord":"Sun"},{"name":"Hora 23","start":"05:21","end":"06:21","startHours":29.3429653240276,"endHours":30.3429653240276,"planetary_lord":"Mars"},{"name":"Hora 24","start":"06:21","end":"07:21","startHours":30.3429653240276,"endHours":31.3429653240276,"planetary_lord":"Jupiter"}],"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":["Meṣa","Vṛṣabha","Siṃha","Kanyā","Vṛścika","Makara"],"unfavorable_rashis":["Mithuna","Karka","Tulā","Dhanu","Kumbha","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"North-East","rahuVasa":"North-East","anandadiYoga":{"name":"Kāṇa","quality":"Inauspicious"},"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":-22.74188853337645,"eotMinutes":-5.02390686534617,"ayanamsa":23.5877}},"calendars":{"vikram_samvat":2038,"vikram_samvatsara":"Bhāva","saka_samvat":1903,"saka_samvatsara":"Durmati","bengali_samvat":1388,"malayalam_era":1157,"nanakshahi_year":512,"lunar_month":"Pauṣa","lunar_month_paksha_full":"Pauṣa Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Pauṣa","lunar_month_amanta":"Mārgaśīrṣa","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 Kṛṣṇa Trayodaśī · Vikram 2038 Bhāva · Śaka 1903 Durmati"},"festivals":[{"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":"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 Jyeṣṭhā","url":"/day/-3137-10-20","relevance":0.5}]},"validity":{"eternal":false,"location_specific":"shimla"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga January 4, 1981 CE · Shimla, Himachal Pradesh · Vidhyamitra","description":"January 4, 1981 CE for Shimla, Himachal Pradesh: Kṛṣṇa Trayodaśī, sūryodaya 07:21, sūryāsta 17:32.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/shimla/1981-01-04","hreflang_alternates":{"en":"https://vidhyamitra.com/city/shimla/1981-01-04","sa":"https://sa.vidhyamitra.com/city/shimla/1981-01-04","hi":"https://hi.vidhyamitra.com/city/shimla/1981-01-04","x-default":"https://vidhyamitra.com/city/shimla/1981-01-04"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-06-02T13:03:23.488Z","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":"2026-06-02T13:03:23.488Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-06-02T13:03:23.488Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"}}}