🪷 ओणम् (वामन-बलि स्मरण) · Onam (Vāmana / King Bali)

Tradition

Tradition: Regional

Vrata: No

How the day is decided

The Śravaṇa nakṣatra at sunrise, with the Sun in Siṃha.

Source: the nakṣatra at sunrise, by the Sūrya Siddhānta's Moon. Computed on the Sūrya Siddhānta's sunrise, tithi and Moon at Ujjayinī (a city's page uses that city's sunrise).

Detection Rule (Pure Pañchāṅga-Based)

{
  "nakshatra_name": "Śravaṇa",
  "sun_rashi": "Siṃha"
}