Full moon day in a Hindu lunar month is referred as Purnima. Vrat (fasting) and special pujas are held on the day. Purnima January 2018 date is January 2 and January 31. The day is an important bathing date during the Allahabad Magh Mela 2018.
This is the Paush purnima in most calendars. In Tamil Calendars, it is the Thai Purnima.
Magh Mela – Snan at Prayag in Uttar Pradesh begins on Paush Purnima (This year Magh Snan coincides with the Kumbha Mela). Magh Snan is an important bathing ritual at Sangam in
Allahabad. There is a popular belief that taking a holy dip at Sangam on the Paush Purnima day will help in attaining Moksha.
The day is also sacred for Shakambari Ma devotees. This Poornima also marks the end of Shakambari Navratri. Many temples in
India conduct important pujas and rituals on the day. Shakambari Jayanti is held on the day.