Governor Acharya Devvrat inaugurated the four-day long International Shimla Summer Festival at the historic Ridge here on Monday evening.Deputy Commissioner Shimla Amit Kashyap, who is the Chairman of the Summer Festival Organising Committee welcomed the Governor and honoured him by presenting him a Himachali cap, a shawl and a Memento. Mayor, Municipal Corporation Shimla Kusum Sadret also honoured Lady Governor Darshana Devi on the occasion.First day of the cultural evening witness a performance of Indian Idol fame singers Kritika Tanwar, Anuj Sharma and playback singer Mamta Joshi. The Governor also witnessed the cultural programme.