Guru Purnima in the Year 2021 will be Celebrated on Saturday, 24th of July 2021.
This page lists actual Purnima or Pournami days on Hindu Lunar Calendar. This list might not be suitable for Shri Satyanarayan Puja and Pournima fasting which might be observed either on the same day or one day before depending on the starting time of Purnima Tithi on the previous day.
Pournami Vratam and Shri Satyanarayana Puja, which are observed on full moon day, might be observed one day before of Purnima Tithi. Please check Shri Satyanarayan Puja to know Shri Satyanarayan's fasting days and Purnima Vrat Days to know Pournami's fasting days.