Hariyali Amavasya 2026 is being observed today, August 12, during the holy month of Shravan. Devotees worship Lord Shiva, perform rituals for their ancestors, offer charity and plant trees on this auspicious day. According to Drik Panchang, Hariyali Amavasya is being observed on August 12, 2026. What Is The Significance Of Hariyali Amavasya? Planting and caring for trees is another important tradition associated with Hariyali Amavasya, linking religious observance with respect for nature.