Hariyali Amavasya Kab Hai 2026: Hariyali Amavasya, also known as Sawan Amavasya, will be observed on August 12, 2026, while Sawan Shivratri falls on August 11. The day is considered significant for snan-daan, Pitru tarpan, prayers and charity, and is closely associated with greenery and nature during the monsoon season. The Amavasya tithi begins around 1:52 am and ends at 11:06 pm on August 12, though timings can vary by location.