{"id":"vidhyamitra:city-day:thane:1971-02-13:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/thane/1971-02-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1971-02-13","date_display":"February 13, 1971 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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1971,"month":2,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2440995.770833,"kali_year":5072,"ahargana":1852530.2708,"sun":{"sidereal_longitude":300.3804,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":152.9909,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":212.6105,"elapsed_within_tithi_degrees":8.6105},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":152.9909,"elapsed_within_degrees":6.3243},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":93.3714},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"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":1971,"month":2,"day":13,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2440995.770833,"ahargana":1852530.2708,"kali_year":5072,"ayanamsa_lahiri":23.4495,"grahas":{"sun":{"sidereal_longitude":300.224568,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":149.677568,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":1},"retrograde":false,"latitude":-2.1772},"mars":{"sidereal_longitude":230.06676800000002,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":18,"name":"Jyeṣṭhā","pada":2},"retrograde":false},"mercury":{"sidereal_longitude":284.91356799999994,"rashi":{"number":10,"name":"Makara"},"nakshatra":{"number":22,"name":"Śravaṇa","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":221.56026799999995,"rashi":{"number":8,"name":"Vṛścika"},"nakshatra":{"number":17,"name":"Anurādhā","pada":3},"retrograde":false},"venus":{"sidereal_longitude":255.12606800000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":1},"retrograde":false},"saturn":{"sidereal_longitude":23.310767999999996,"rashi":{"number":1,"name":"Meṣa"},"nakshatra":{"number":2,"name":"Bharaṇī","pada":3},"retrograde":false},"rahu":{"sidereal_longitude":304.0313,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":124.0313,"rashi":{"number":5,"name":"Siṃha"},"nakshatra":{"number":10,"name":"Maghā","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":"Not independently benchmarked across the declared range","tradition_chain":"Āryabhaṭa(499) → Brahmagupta(628) → Bhāskara II(1150) → Mādhava(~1400) → Parameśvara(1430) → Nīlakaṇṭha(1501) → this","input":{"year":1971,"month":2,"day":13,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2440995.770833,"kali_year":5072,"ahargana":1852530.2708,"sun":{"sidereal_longitude":300.3804,"rashi":11,"rashi_name":"Kumbha"},"moon":{"sidereal_longitude":152.9909,"rashi":6,"rashi_name":"Kanyā"},"tithi":{"number":18,"name":"Tṛtīyā","paksha":"Kṛṣṇa","full_name":"Kṛṣṇa Tṛtīyā","elongation_degrees":212.6105,"elapsed_within_tithi_degrees":8.6105},"nakshatra":{"number":12,"name":"Uttara Phalgunī","pada":2,"moon_longitude":152.9909,"elapsed_within_degrees":6.3243},"yoga":{"number":8,"name":"Dhṛti","sum_longitude":93.3714},"karana":{"half_tithi_index":35,"name":"Viṣṭi"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.177,"elongation":147.39},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.177,"opposition_distance":32.61}},"eclipse_window_40days":[{"offset_days":-3,"type":"lunar","occurs":true,"moon_latitude":0.69,"opposition_distance":1.965}]},"city":{"slug":"thane","name":"Thane, Maharashtra","lat":19.2183,"lon":72.9781,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"tier2":{"city":{"slug":"thane","name":"Thane, Maharashtra","lat":19.2183,"lon":72.9781,"tz_offset_hours":5.5,"state":"Maharashtra","country":"IN","tier":"tier-1"},"sunriseLocal":"07:08","sunsetLocal":"18:37","solarNoonLocal":"12:53","dayLengthHours":11.474995783979809,"dayLengthDisplay":"11 Hours 28 Mins 30 Secs","nightLengthDisplay":"12 Hours 31 Mins 30 Secs","moonriseLocal":"20:44","moonsetLocal":"08:57","rahuKala":{"name":"Rāhu Kāla","start":"10:01","end":"11:27","startHours":10.00936980834875,"endHours":11.443744281346227,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"14:19","end":"15:45","startHours":14.312493227341179,"endHours":15.746867700338655,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"07:08","end":"08:34","startHours":7.1406208623537974,"endHours":8.574995335351273,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:49","end":"10:12","startHours":9.818119878615754,"endHours":10.200619738081746,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:37","end":"07:55","startHours":7.61874568668629,"endHours":7.924745574259084,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:30","end":"13:16","startHours":12.495618894877708,"endHours":13.260618613809697,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:37","end":"06:23","startHours":5.610621424489823,"endHours":6.37562114342181,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"06:11","end":"07:08","startHours":6.184371213688813,"endHours":7.1406208623537974,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:47","end":"15:33","startHours":14.79061805167367,"endHours":15.555617770605657,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:25","end":"18:49","startHours":18.415616646333607,"endHours":18.815616646333606,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:37","end":"19:06","startHours":18.615616646333606,"endHours":19.0937414706661,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:22","end":"20:07","startHours":18.365616646333606,"endHours":20.115616646333606,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:30","end":"01:16","startHours":24.49561889487771,"endHours":25.260618613809697,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Kāla","start":"07:08","end":"08:34","startHours":7.1406208623537974,"endHours":8.574995335351273,"quality":"inauspicious"},{"name":"Śubha","start":"08:34","end":"10:01","startHours":8.574995335351273,"endHours":10.00936980834875,"quality":"auspicious"},{"name":"Roga","start":"10:01","end":"11:27","startHours":10.00936980834875,"endHours":11.443744281346227,"quality":"inauspicious"},{"name":"Udveg","start":"11:27","end":"12:53","startHours":11.443744281346227,"endHours":12.878118754343703,"quality":"inauspicious"},{"name":"Chala","start":"12:53","end":"14:19","startHours":12.878118754343703,"endHours":14.312493227341179,"quality":"neutral"},{"name":"Labha","start":"14:19","end":"15:45","startHours":14.312493227341179,"endHours":15.746867700338655,"quality":"auspicious"},{"name":"Amṛta","start":"15:45","end":"17:11","startHours":15.746867700338655,"endHours":17.18124217333613,"quality":"auspicious"},{"name":"Kāla","start":"17:11","end":"18:37","startHours":17.18124217333613,"endHours":18.615616646333606,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Labha","start":"18:37","end":"20:11","startHours":18.615616646333606,"endHours":20.18124217333613,"quality":"auspicious"},{"name":"Amṛta","start":"20:11","end":"21:45","startHours":20.18124217333613,"endHours":21.746867700338655,"quality":"auspicious"},{"name":"Kāla","start":"21:45","end":"23:19","startHours":21.746867700338655,"endHours":23.31249322734118,"quality":"inauspicious"},{"name":"Śubha","start":"23:19","end":"00:53","startHours":23.31249322734118,"endHours":24.878118754343703,"quality":"auspicious"},{"name":"Roga","start":"00:53","end":"02:27","startHours":24.878118754343703,"endHours":26.443744281346227,"quality":"inauspicious"},{"name":"Udveg","start":"02:27","end":"04:01","startHours":26.443744281346227,"endHours":28.00936980834875,"quality":"inauspicious"},{"name":"Chala","start":"04:01","end":"05:34","startHours":28.00936980834875,"endHours":29.574995335351275,"quality":"neutral"},{"name":"Labha","start":"05:34","end":"07:08","startHours":29.574995335351275,"endHours":31.1406208623538,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"07:08","end":"08:08","startHours":7.1406208623537974,"endHours":8.140620862353797,"planetary_lord":"Saturn"},{"name":"Hora 2","start":"08:08","end":"09:08","startHours":8.140620862353797,"endHours":9.140620862353797,"planetary_lord":"Moon"},{"name":"Hora 3","start":"09:08","end":"10:08","startHours":9.140620862353797,"endHours":10.140620862353797,"planetary_lord":"Mercury"},{"name":"Hora 4","start":"10:08","end":"11:08","startHours":10.140620862353797,"endHours":11.140620862353797,"planetary_lord":"Venus"},{"name":"Hora 5","start":"11:08","end":"12:08","startHours":11.140620862353797,"endHours":12.140620862353797,"planetary_lord":"Sun"},{"name":"Hora 6","start":"12:08","end":"13:08","startHours":12.140620862353797,"endHours":13.140620862353797,"planetary_lord":"Mars"},{"name":"Hora 7","start":"13:08","end":"14:08","startHours":13.140620862353797,"endHours":14.140620862353797,"planetary_lord":"Jupiter"},{"name":"Hora 8","start":"14:08","end":"15:08","startHours":14.140620862353797,"endHours":15.140620862353797,"planetary_lord":"Saturn"},{"name":"Hora 9","start":"15:08","end":"16:08","startHours":15.140620862353797,"endHours":16.1406208623538,"planetary_lord":"Moon"},{"name":"Hora 10","start":"16:08","end":"17:08","startHours":16.1406208623538,"endHours":17.1406208623538,"planetary_lord":"Mercury"},{"name":"Hora 11","start":"17:08","end":"18:08","startHours":17.1406208623538,"endHours":18.1406208623538,"planetary_lord":"Venus"},{"name":"Hora 12","start":"18:08","end":"19:08","startHours":18.1406208623538,"endHours":19.1406208623538,"planetary_lord":"Sun"},{"name":"Hora 13","start":"19:08","end":"20:08","startHours":19.1406208623538,"endHours":20.1406208623538,"planetary_lord":"Mars"},{"name":"Hora 14","start":"20:08","end":"21:08","startHours":20.1406208623538,"endHours":21.1406208623538,"planetary_lord":"Jupiter"},{"name":"Hora 15","start":"21:08","end":"22:08","startHours":21.1406208623538,"endHours":22.1406208623538,"planetary_lord":"Saturn"},{"name":"Hora 16","start":"22:08","end":"23:08","startHours":22.1406208623538,"endHours":23.1406208623538,"planetary_lord":"Moon"},{"name":"Hora 17","start":"23:08","end":"00:08","startHours":23.1406208623538,"endHours":24.1406208623538,"planetary_lord":"Mercury"},{"name":"Hora 18","start":"00:08","end":"01:08","startHours":24.1406208623538,"endHours":25.1406208623538,"planetary_lord":"Venus"},{"name":"Hora 19","start":"01:08","end":"02:08","startHours":25.1406208623538,"endHours":26.1406208623538,"planetary_lord":"Sun"},{"name":"Hora 20","start":"02:08","end":"03:08","startHours":26.1406208623538,"endHours":27.1406208623538,"planetary_lord":"Mars"},{"name":"Hora 21","start":"03:08","end":"04:08","startHours":27.1406208623538,"endHours":28.1406208623538,"planetary_lord":"Jupiter"},{"name":"Hora 22","start":"04:08","end":"05:08","startHours":28.1406208623538,"endHours":29.1406208623538,"planetary_lord":"Saturn"},{"name":"Hora 23","start":"05:08","end":"06:08","startHours":29.1406208623538,"endHours":30.1406208623538,"planetary_lord":"Moon"},{"name":"Hora 24","start":"06:08","end":"07:08","startHours":30.1406208623538,"endHours":31.1406208623538,"planetary_lord":"Mercury"}],"taraBala":{"favorable_nakshatras":["Rohiṇī","Mṛgaśirā","Ārdrā","Punarvasu","Puṣya","Hasta","Citrā","Svātī","Viśākhā","Anurādhā","Śravaṇa","Dhaniṣṭhā","Śatabhiṣaj","Pūrva Bhādrapadā","Uttara Bhādrapadā"],"unfavorable_nakshatras":["Aśvinī","Bharaṇī","Kṛttikā","Aśleṣā","Maghā","Pūrva Phalgunī","Uttara Phalgunī","Jyeṣṭhā","Mūla","Pūrva Āṣāḍhā","Uttara Āṣāḍhā","Revatī"],"nature":"Janma-tara if same nakshatra; favorable for 15 nakshatras"},"chandraBala":{"favorable_rashis":["Vṛṣabha","Mithuna","Siṃha","Tulā","Makara","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Kanyā","Vṛścika","Dhanu","Mīna"]},"dishaShool":"East (Pūrva)","chandraVasa":"West","rahuVasa":"East","anandadiYoga":{"name":"Śrīvatsa","quality":"Auspicious"},"tropicalRitu":"Śiśira (Winter)","vedicRitu":"Śiśira (Winter)","tropicalAyana":"Uttarāyaṇa","vedicAyana":"Uttarāyaṇa","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-13.627459820972225,"eotMinutes":-14.599525260622107,"ayanamsa":23.4495}},"calendars":{"vikram_samvat":2028,"vikram_samvatsara":"Raktākṣī","saka_samvat":1893,"saka_samvatsara":"Virodhakṛt","bengali_samvat":1378,"malayalam_era":1147,"nanakshahi_year":502,"lunar_month":"Phālguna","lunar_month_paksha_full":"Phālguna Kṛṣṇa Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Phālguna","lunar_month_amanta":"Māgha","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 Kṛṣṇa Tṛtīyā · Vikram 2028 Raktākṣī · Śaka 1893 Virodhakṛt"},"festivals":[],"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":"thane"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga February 13, 1971 CE · Thane, Maharashtra · Vidhyamitra","description":"February 13, 1971 CE for Thane, Maharashtra: Kṛṣṇa Tṛtīyā, sūryodaya 07:08, sūryāsta 18:37.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/thane/1971-02-13","hreflang_alternates":{"en":"https://vidhyamitra.com/city/thane/1971-02-13","sa":"https://sa.vidhyamitra.com/city/thane/1971-02-13","hi":"https://hi.vidhyamitra.com/city/thane/1971-02-13","x-default":"https://vidhyamitra.com/city/thane/1971-02-13"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-09-06T06:18:21.777Z","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":"2026-09-06T06:18:21.777Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-09-06T06:18:21.777Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"},"reader_local_antaryami":{"reader_geography":"Every reader enters from their own kṣetra anywhere on Bhūmi; no single city is the universal center.","purna_chain":["Hosted scripture","Named-tradition interpretation","Original Vidhyamitra contemplation","Bhūmi-born material medium","Vidhyamitra portal","Responsible reader in their own kṣetra"],"claim_boundary":"The legacy purna_chain field carries a source-to-reader sequence, not a revealed physical descent, universal cosmology, or proof that software is conscious.","antaryami_responsibility_formula":"Kṣīrodakaśāyī Viṣṇu = Paramātmā = Antaryāmī. Jīva desires. Prakṛti executes through guṇas. Paramātmā witnesses, permits, remembers, guides, and sustains. Bhagavān is the ultimate source.","source_anchors":[{"label":"BG 13.23","path":"/bhagavad-gita/13/23","meaning":"upadraṣṭā-anumantā · witness-permitter"},{"label":"BG 15.15","path":"/bhagavad-gita/15/15","meaning":"the Lord seated in every heart as memory, knowledge, and forgetting"},{"label":"BG 18.61","path":"/bhagavad-gita/18/61","meaning":"Īśvara seated in the heart of all beings"}],"nama_seal":"Hare Krishna Hare Krishna · Krishna Krishna Hare Hare · Hare Rama Hare Rama · Rama Rama Hare Hare"}}}