Early morning you can leave for tiger hill to witness the spectacular sunrises over the Himalayas. Also you can visit Batasia Loop and Ghoom Monastry. Later you may take a half day tour of Darjeeling and visit the Himalayan Mountaineering Institute, the zoo, the Tensing Rock, Tea estate. at leisure. Overnight at hotel.
In the morning you can depart for a half day excursion to Mirik lake (on own). Enjoy boating on the lake (own lake). the evening you could meet the local people, indulge in the last minute shopping, or just enjoy the scenic beauty of Darjeeling.