Purnima

Purnima (also called Poornima, Pournima, Sanskrit: पूर्णिमा (IAST: pūrṇimā)) is the Indian and Nepali word for Full Moon. The day of Purnima is the day (Tithi) in each month in which the full moon occurs, and marks the division in each month between the two lunar fortnights (Paksha). The Shukla ("bright") Paksha is the fortnight before, and the Krishna ("dark") Paksha is the fortnight after, Purnima.

The following festivals occur on Purnima.

...
Wikipedia