{"id":"vidhyamitra:city-day:singapore:2026-10-18:en","page_class":"VM-CD-city-day","url":"https://vidhyamitra.com/city/singapore/2026-10-18","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"2026-10-18","date_display":"October 18, 2026 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":2026,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461331.770833,"kali_year":5128,"ahargana":1872866.2708,"sun":{"sidereal_longitude":179.6558,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":265.1221,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":85.4663,"elapsed_within_tithi_degrees":1.4663},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4,"moon_longitude":265.1221,"elapsed_within_degrees":11.7888},"yoga":{"number":7,"name":"Sukarma","sum_longitude":84.7779},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"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":2026,"month":10,"day":18,"hour":6,"minute":30,"calendar":"gregorian"},"julian_day":2461331.770833,"ahargana":1872866.2708,"kali_year":5128,"ayanamsa_lahiri":24.2273,"grahas":{"sun":{"sidereal_longitude":180.44998399999997,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":14,"name":"Citrā","pada":3},"retrograde":false},"moon":{"sidereal_longitude":263.55888400000003,"rashi":{"number":9,"name":"Dhanu"},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4},"retrograde":false,"latitude":-2.9748},"mars":{"sidereal_longitude":106.73188400000004,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":1},"retrograde":false},"mercury":{"sidereal_longitude":204.39438399999995,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":16,"name":"Viśākhā","pada":2},"retrograde":false},"jupiter":{"sidereal_longitude":117.97358399999996,"rashi":{"number":4,"name":"Karka"},"nakshatra":{"number":9,"name":"Aśleṣā","pada":4},"retrograde":false},"venus":{"sidereal_longitude":189.82028400000002,"rashi":{"number":7,"name":"Tulā"},"nakshatra":{"number":15,"name":"Svātī","pada":1},"retrograde":true},"saturn":{"sidereal_longitude":346.070784,"rashi":{"number":12,"name":"Mīna"},"nakshatra":{"number":26,"name":"Uttara Bhādrapadā","pada":4},"retrograde":true},"rahu":{"sidereal_longitude":306.5321,"rashi":{"number":11,"name":"Kumbha"},"nakshatra":{"number":23,"name":"Dhaniṣṭhā","pada":4},"retrograde":false},"ketu":{"sidereal_longitude":126.5321,"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":"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":2026,"month":10,"day":18,"hour":6,"minute":30,"second":0,"calendar":"gregorian"},"julian_day":2461331.770833,"kali_year":5128,"ahargana":1872866.2708,"sun":{"sidereal_longitude":179.6558,"rashi":6,"rashi_name":"Kanyā"},"moon":{"sidereal_longitude":265.1221,"rashi":9,"rashi_name":"Dhanu"},"tithi":{"number":8,"name":"Aṣṭamī","paksha":"Śukla","full_name":"Śukla Aṣṭamī","elongation_degrees":85.4663,"elapsed_within_tithi_degrees":1.4663},"nakshatra":{"number":20,"name":"Pūrva Āṣāḍhā","pada":4,"moon_longitude":265.1221,"elapsed_within_degrees":11.7888},"yoga":{"number":7,"name":"Sukarma","sum_longitude":84.7779},"karana":{"half_tithi_index":14,"name":"Viṣṭi"},"vara":{"number":2,"name":"Ravivāra (Sunday)"}},"eclipse_current":{"solar":{"type":"solar","occurs":false,"moon_latitude":-2.975,"elongation":85.466},"lunar":{"type":"lunar","occurs":false,"moon_latitude":-2.975,"opposition_distance":94.534}},"eclipse_window_40days":[]},"city":{"slug":"singapore","name":"Singapore","lat":1.3521,"lon":103.8198,"tz_offset_hours":8,"country":"SG","tier":"diaspora"},"tier2":{"city":{"slug":"singapore","name":"Singapore","lat":1.3521,"lon":103.8198,"tz_offset_hours":8,"country":"SG","tier":"diaspora"},"sunriseLocal":"06:47","sunsetLocal":"18:52","solarNoonLocal":"12:49","dayLengthHours":12.082295684143858,"dayLengthDisplay":"12 Hours 04 Mins 56 Secs","nightLengthDisplay":"11 Hours 55 Mins 04 Secs","moonriseLocal":"12:21","moonsetLocal":"00:22","rahuKala":{"name":"Rāhu Kāla","start":"17:21","end":"18:52","startHours":17.352946578166975,"endHours":18.863233538684955,"quality":"inauspicious"},"yamaganda":{"name":"Yamaganda","start":"12:49","end":"14:20","startHours":12.822085696613026,"endHours":14.33237265713101,"quality":"inauspicious"},"gulika":{"name":"Gulika Kāla","start":"15:51","end":"17:21","startHours":15.842659617648991,"endHours":17.352946578166975,"quality":"inauspicious"},"durMuhurta":[{"name":"Dur Muhūrta","start":"09:36","end":"10:00","startHours":9.600140180841333,"endHours":10.002883370312794,"quality":"avoid"}],"varjyam":{"name":"Varjyam","start":"07:17","end":"07:36","startHours":7.284366841380425,"endHours":7.606561392957595,"quality":"avoid"},"abhijit":{"name":"Abhijit Muhūrta","start":"12:25","end":"13:13","startHours":12.419342507141565,"endHours":13.224828886084488,"quality":"auspicious"},"brahmaMuhurta":{"name":"Brahma Muhūrta","start":"05:10","end":"05:59","startHours":5.16996509665525,"endHours":5.975451475598174,"quality":"auspicious"},"pratahSandhya":{"name":"Prātaḥ Sandhyā","start":"05:46","end":"06:47","startHours":5.774079880862443,"endHours":6.780937854541098,"quality":"auspicious"},"vijayaMuhurta":{"name":"Vijaya Muhūrta","start":"14:50","end":"15:38","startHours":14.835801643970335,"endHours":15.641288022913258,"quality":"auspicious"},"godhuliMuhurta":{"name":"Godhūli Muhūrta","start":"18:40","end":"19:04","startHours":18.663233538684956,"endHours":19.063233538684955,"quality":"auspicious"},"sayahnaSandhya":{"name":"Sāyāhna Sandhyā","start":"18:52","end":"19:22","startHours":18.863233538684955,"endHours":19.366662525524283,"quality":"auspicious"},"amritKala":{"name":"Amṛta Kāla","start":"18:37","end":"20:22","startHours":18.613233538684955,"endHours":20.363233538684955,"quality":"auspicious"},"nishitaMuhurta":{"name":"Niśīta Muhūrta","start":"00:25","end":"01:13","startHours":24.419342507141565,"endHours":25.224828886084488,"quality":"auspicious"},"dayChoghadiyas":[{"name":"Udveg","start":"06:47","end":"08:17","startHours":6.780937854541098,"endHours":8.291224815059081,"quality":"inauspicious"},{"name":"Chala","start":"08:17","end":"09:48","startHours":8.291224815059081,"endHours":9.801511775577062,"quality":"neutral"},{"name":"Labha","start":"09:48","end":"11:19","startHours":9.801511775577062,"endHours":11.311798736095046,"quality":"auspicious"},{"name":"Amṛta","start":"11:19","end":"12:49","startHours":11.311798736095046,"endHours":12.822085696613026,"quality":"auspicious"},{"name":"Kāla","start":"12:49","end":"14:20","startHours":12.822085696613026,"endHours":14.33237265713101,"quality":"inauspicious"},{"name":"Śubha","start":"14:20","end":"15:51","startHours":14.33237265713101,"endHours":15.842659617648991,"quality":"auspicious"},{"name":"Roga","start":"15:51","end":"17:21","startHours":15.842659617648991,"endHours":17.352946578166975,"quality":"inauspicious"},{"name":"Udveg","start":"17:21","end":"18:52","startHours":17.352946578166975,"endHours":18.863233538684955,"quality":"inauspicious"}],"nightChoghadiyas":[{"name":"Śubha","start":"18:52","end":"20:21","startHours":18.863233538684955,"endHours":20.35294657816697,"quality":"auspicious"},{"name":"Roga","start":"20:21","end":"21:51","startHours":20.35294657816697,"endHours":21.84265961764899,"quality":"inauspicious"},{"name":"Udveg","start":"21:51","end":"23:20","startHours":21.84265961764899,"endHours":23.33237265713101,"quality":"inauspicious"},{"name":"Chala","start":"23:20","end":"00:49","startHours":23.33237265713101,"endHours":24.822085696613026,"quality":"neutral"},{"name":"Labha","start":"00:49","end":"02:19","startHours":24.822085696613026,"endHours":26.311798736095042,"quality":"auspicious"},{"name":"Amṛta","start":"02:19","end":"03:48","startHours":26.311798736095042,"endHours":27.80151177557706,"quality":"auspicious"},{"name":"Kāla","start":"03:48","end":"05:17","startHours":27.80151177557706,"endHours":29.29122481505908,"quality":"inauspicious"},{"name":"Śubha","start":"05:17","end":"06:47","startHours":29.29122481505908,"endHours":30.780937854541097,"quality":"auspicious"}],"horas":[{"name":"Hora 1","start":"06:47","end":"07:47","startHours":6.780937854541098,"endHours":7.780937854541098,"planetary_lord":"Sun"},{"name":"Hora 2","start":"07:47","end":"08:47","startHours":7.780937854541098,"endHours":8.780937854541097,"planetary_lord":"Mars"},{"name":"Hora 3","start":"08:47","end":"09:47","startHours":8.780937854541097,"endHours":9.780937854541097,"planetary_lord":"Jupiter"},{"name":"Hora 4","start":"09:47","end":"10:47","startHours":9.780937854541097,"endHours":10.780937854541097,"planetary_lord":"Saturn"},{"name":"Hora 5","start":"10:47","end":"11:47","startHours":10.780937854541097,"endHours":11.780937854541097,"planetary_lord":"Moon"},{"name":"Hora 6","start":"11:47","end":"12:47","startHours":11.780937854541097,"endHours":12.780937854541097,"planetary_lord":"Mercury"},{"name":"Hora 7","start":"12:47","end":"13:47","startHours":12.780937854541097,"endHours":13.780937854541097,"planetary_lord":"Venus"},{"name":"Hora 8","start":"13:47","end":"14:47","startHours":13.780937854541097,"endHours":14.780937854541097,"planetary_lord":"Sun"},{"name":"Hora 9","start":"14:47","end":"15:47","startHours":14.780937854541097,"endHours":15.780937854541097,"planetary_lord":"Mars"},{"name":"Hora 10","start":"15:47","end":"16:47","startHours":15.780937854541097,"endHours":16.780937854541097,"planetary_lord":"Jupiter"},{"name":"Hora 11","start":"16:47","end":"17:47","startHours":16.780937854541097,"endHours":17.780937854541097,"planetary_lord":"Saturn"},{"name":"Hora 12","start":"17:47","end":"18:47","startHours":17.780937854541097,"endHours":18.780937854541097,"planetary_lord":"Moon"},{"name":"Hora 13","start":"18:47","end":"19:47","startHours":18.780937854541097,"endHours":19.780937854541097,"planetary_lord":"Mercury"},{"name":"Hora 14","start":"19:47","end":"20:47","startHours":19.780937854541097,"endHours":20.780937854541097,"planetary_lord":"Venus"},{"name":"Hora 15","start":"20:47","end":"21:47","startHours":20.780937854541097,"endHours":21.780937854541097,"planetary_lord":"Sun"},{"name":"Hora 16","start":"21:47","end":"22:47","startHours":21.780937854541097,"endHours":22.780937854541097,"planetary_lord":"Mars"},{"name":"Hora 17","start":"22:47","end":"23:47","startHours":22.780937854541097,"endHours":23.780937854541097,"planetary_lord":"Jupiter"},{"name":"Hora 18","start":"23:47","end":"00:47","startHours":23.780937854541097,"endHours":24.780937854541097,"planetary_lord":"Saturn"},{"name":"Hora 19","start":"00:47","end":"01:47","startHours":24.780937854541097,"endHours":25.780937854541097,"planetary_lord":"Moon"},{"name":"Hora 20","start":"01:47","end":"02:47","startHours":25.780937854541097,"endHours":26.780937854541097,"planetary_lord":"Mercury"},{"name":"Hora 21","start":"02:47","end":"03:47","startHours":26.780937854541097,"endHours":27.780937854541097,"planetary_lord":"Venus"},{"name":"Hora 22","start":"03:47","end":"04:47","startHours":27.780937854541097,"endHours":28.780937854541097,"planetary_lord":"Sun"},{"name":"Hora 23","start":"04:47","end":"05:47","startHours":28.780937854541097,"endHours":29.780937854541097,"planetary_lord":"Mars"},{"name":"Hora 24","start":"05:47","end":"06:47","startHours":29.780937854541097,"endHours":30.780937854541097,"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":["Vṛṣabha","Mithuna","Kanyā","Tulā","Dhanu","Kumbha"],"unfavorable_rashis":["Meṣa","Karka","Siṃha","Vṛścika","Makara","Mīna"]},"dishaShool":"West (Paścim)","chandraVasa":"East","rahuVasa":"North-East","anandadiYoga":{"name":"Śubha","quality":"Auspicious"},"tropicalRitu":"Śarad (Autumn)","vedicRitu":"Śarad (Autumn)","tropicalAyana":"Dakṣiṇāyana","vedicAyana":"Dakṣiṇāyana","meta":{"method":"BOB-History Sūrya-Siddhānta + Vidhyamitra Tier-2 spherical localization","declination":-9.558586610199995,"eotMinutes":15.395658203218455,"ayanamsa":24.2273}},"calendars":{"vikram_samvat":2083,"vikram_samvatsara":"Siddhārthī","saka_samvat":1948,"saka_samvatsara":"Parābhava","bengali_samvat":1433,"malayalam_era":1202,"nanakshahi_year":557,"lunar_month":"Āśvina","lunar_month_paksha_full":"Āśvina Śukla Pakṣa","lunar_month_system":"purnimanta","lunar_month_purnimanta":"Āśvina","lunar_month_amanta":"Āśvina","lunar_month_is_adhika":false,"lunar_month_purnimanta_is_adhika":false,"lunar_month_amanta_is_adhika":false,"solar_month":"Tulā (Aippasi)","ritu":"Śarad (Autumn)","display_summary":"Āśvina Śukla Aṣṭamī · Vikram 2083 Siddhārthī · Śaka 1948 Parābhava"},"festivals":[{"id":"durga-ashtami","name":"Mahā-Aṣṭamī (Durgā-Aṣṭamī)","name_sanskrit":"महाष्टमी","tradition":"Shakta","associated_deity":"Devī Durgā","significance":"8th day of Śāradīya Navrātri; Mahiṣāsura-mardinī kṣaṇa.","vrata":true,"detection":{"tithi_number":8,"tithi_paksha":"Śukla","lunar_month":"Āśvina"},"precedence":1},{"id":"tula-sankranti","name":"Tulā Saṅkrānti","name_sanskrit":"तुला सङ्क्रान्ति","tradition":"Pan-Hindu","significance":"Sun enters Libra.","vrata":false,"detection":{"sun_rashi_ingress":"Tulā"},"precedence":5}],"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":"Dedicated festival walk for Mahā-Aṣṭamī (Durgā-Aṣṭamī) · Tulā Saṅkrānti is not live yet; Ravivāra (Sunday) — its presiding graha's walk."},"cosmic_resonances":[]},"validity":{"eternal":false,"location_specific":"singapore"},"liturgical":{"opening":"जय श्री कृष्ण","closing":"ॐ तत् सत्","attribution":"Computed by Vidhyamitra Sūrya-Siddhānta substrate + Vidhyamitra Tier-2 layer"},"seo":{"title":"Pañchāṅga October 18, 2026 CE · Singapore · Vidhyamitra","description":"October 18, 2026 CE for Singapore: Śukla Aṣṭamī, sūryodaya 06:47, sūryāsta 18:52.","schema_org_type":"Article","canonical":"https://vidhyamitra.com/city/singapore/2026-10-18","hreflang_alternates":{"en":"https://vidhyamitra.com/city/singapore/2026-10-18","sa":"https://sa.vidhyamitra.com/city/singapore/2026-10-18","hi":"https://hi.vidhyamitra.com/city/singapore/2026-10-18","x-default":"https://vidhyamitra.com/city/singapore/2026-10-18"}},"provenance":[{"pillar":"BOB-History","pillar_version":"2.12.0","method":"Sūrya-Siddhānta first-principles + Bhāskara II + Kerala-school (Mādhava-Nīlakaṇṭha) corrections","retrieved_at":"2026-07-23T17:25:41.183Z","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":"2026-07-23T17:25:41.183Z","verification":{"type":"community-validated","markers":["modern-reference checked timing on Narasiṁha Jayantī 2026"],"confidence":"verified"}}],"meta":{"generated_at":"2026-07-23T17:25:41.183Z","pillar_versions":{"Sūrya-Siddhānta":"Pūrṇa","Vidhyamitra-Tier2":"Pūrṇa"},"reader_local_antaryami":{"reader_geography":"Every reader enters from their own kṣetra anywhere on Bhūmi; no founder-city is the universal center.","purna_chain":["Goloka/Vraja Rādhā-Krishna","Vaikuṇṭha Lakṣmī-Nārāyaṇa","Mahāviṣṇu/Kāraṇodakaśāyī Viṣṇu","Garbhodakaśāyī Viṣṇu","Brahmā","Kṣīrodaka Paramātmā/Antaryāmī (Kṣīrodakaśāyī Viṣṇu)","Bhūmi","reader's own kṣetra anywhere on Bhūmi","exact reading kṣetra","Divyāṁśa-bhakta","chitta/vāṇī/aṅgulī","keyboard-silicon-pathways","Vidhyāmitra substrate","reader/seer","Krishna"],"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"}}}