{"id":"vidhyamitra:day:1918-04-13:en","page_class":"VM-1-day","url":"https://vidhyamitra.com/day/1918-04-13","language":{"target_lang":"en","base_lang":"en","quality_tier":"canonical"},"data":{"date":"1918-04-13","date_display":"April 13, 1918 CE","panchanga":{"method":"Sūrya Siddhānta (Burgess 1860 text, no bīja): Sun and Moon by the equation of the apsis with the 24-sine table","engine_version":"3.0 (text of the Sūrya Siddhānta)","accuracy_note":"Siddhāntic places, not the observed sky. Against the observed sky 1900-2030 the Moon averages -0.06 deg (max 3.6 deg), the Sun -0.21 deg (max 0.6 deg).","tradition_chain":"Sūrya Siddhānta, tr. E. Burgess (JAOS 6, 1860): I.29-47, II.15-45","input":{"year":1918,"month":4,"day":13,"hour":5,"minute":54.166,"second":0,"calendar":"gregorian"},"julian_day":2421696.745949,"kali_year":5019,"ahargana":1833231.2459,"sun":{"sidereal_longitude":359.7228,"rashi":12,"rashi_name":"Mīna"},"moon":{"sidereal_longitude":23.7019,"rashi":1,"rashi_name":"Meṣa"},"tithi":{"number":2,"name":"Dvitīyā","paksha":"Śukla","full_name":"Śukla Dvitīyā","elongation_degrees":23.979,"elapsed_within_tithi_degrees":11.979},"nakshatra":{"number":2,"name":"Bharaṇī","pada":4,"moon_longitude":23.7019,"elapsed_within_degrees":10.3685},"yoga":{"number":2,"name":"Prīti","sum_longitude":23.4247},"karana":{"half_tithi_index":3,"name":"Kaulava"},"vara":{"number":1,"name":"Śanivāra (Saturday)"}},"sky":{"method":"Sūrya Siddhānta four-step process (II.43-44), tabular sines, even/odd epicycles, no bīja; verified against Burgess 1860 worked example","engine_version":"4.0 (Pūrṇa — Burgess text, 2026-09-26)","tradition_sources":"Sūrya Siddhānta Ch. 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