Rakhi Purnima (Raksha Bandhan) in the year 2020 was celebrated on August 3. The full moon (Purnima) tithi began at 9:28 PM on August 2, 2020, and ended at 9:28 PM on August 3, 2020.
For further reference, Rakhi Purnima is celebrated on the full moon day of the Hindu lunar month of Shravana, which typically falls in August. If you need more details for other years or specific timings, please let me know!
