The Purnima tithi

a birth on the Purnima tithi, the full moon that closes the bright fortnight and falls in that fortnight alone

What the tradition reads

Purnima is the full moon, the fifteenth tithi of the bright fortnight and, unlike the fourteen shared tithi names, unique to that fortnight rather than repeating in the dark half of the month. Clickastro.com names the Vishvadevas as Purnima's ruling deity, the same group given to Amavasya, and classes both together among the three Purna tithis, a class myzodiaq.in reads as bringing satisfaction, wholeness and the completion of a project. Clickastro.com's own reading matches this closely, favouring the completion of any ongoing work, commercial activity, construction and spiritual ritual on the day the Moon stands fullest and most fully lit. Where Amavasya's completion is read toward the ancestors and the unseen, Purnima's is read outward and upward, a fullness suited to gathering, worship and the visible finishing of what has already been well begun.

The story

Wikipedia's article on Purnima records a long calendar of festivals set specifically on full moon days across the Hindu year: Guru Purnima, in the month of Ashadha, also called Vyasa Purnima after the sage Vyasa, author of the Mahabharata, honours teachers on this day; Buddha Purnima, in Vaishakha, marks the birth anniversary of Siddhartha Gautama; Sharad Purnima, in Ashvin, closes the monsoon season with worship of Chandra, the Moon, alongside other gods; and Raksha Bandhan, in Shravana, celebrates the bond between brothers and sisters. That so many of the year's most widely kept festivals fall on a Purnima rather than scattered across other tithis reflects the tradition's own reading of the day as one of natural gathering and culmination, the Moon's full light treated as an invitation to bring people together and to mark, in public, whatever the preceding weeks or months have been building toward.

Written from

Corpus key tithi:Purnima.