
Sawan Purnima, the fifth full moon of the year, will be observed on 28 August 2026, according to the Vedic Panchang. The tithi begins at 9:09 am on 27 August and continues until 9:47 am on 28 August, but the Udaya Tithi (prevailing at sunrise) places the observance on 28 August. Moonrise on the day is at 6:47 pm.

Devotees traditionally fast, perform Jalabhishek of Lord Shiva, chant the Mahamrityunjaya Mantra, offer belpatra, and donate food and clothes to the needy. Holy bathing in rivers like the Ganges is considered especially meritorious. The festival of Raksha Bandhan also falls on Sawan Purnima, which is celebrated in South India as Avani Avittam, the day Brahmins perform the Yajurveda Upakarma sacred thread-changing ceremony. Auspicious timings include Brahma Muhurta from 4:28 am to 5:12 am and Abhijit Muhurta from 11:56 am to 12:48 pm.
Sawan Purnima, which also marks Raksha Bandhan and the Yajurveda Upakarma ceremony for South Indian Brahmins, is one of the most widely observed full moon days in the Hindu calendar. The date confusion arises because the tithi (lunar day) spans two calendar dates, and different regions or panchangas may follow sunrise-based or arunodaya-based reckoning. Devotees planning rituals should confirm the local time of moonrise and their family or temple tradition for fasting. The next significant full moon for which similar calendar disputes recur is Sharad Purnima in October.
Source: timesnownews.com
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