🪷 मासिक शिवरात्रि · Māsika Śivarātri

Tradition

Tradition: Shaiva

Vrata: Yes (fasting day)

How the day is decided

Kṛṣṇa caturdaśī at niśītha, as Mahāśivarātri: on the first day only, the first; on both, the second (it has more pradoṣa); otherwise the second.

Source: Dharmasindhu, caturdaśī-nirṇaya (OCR 1778-1780). 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)

{
  "tithi_number": 29,
  "tithi_paksha": "Kṛṣṇa",
  "kala_rule": "masika-shivaratri"
}