New Delhi, Jan 15 (ANI): The nation on Thursday is celebrating the Army Day. All three service chiefs participated in the celebration. Army Chief General Dalbir Singh Suhag, Chief of Naval Staff Admiral Robin K Dhowan and Air Chief Marshal Arup Raha paid tributes at the Amar Jawan Jyoti at India Gate this morning. The chiefs also lay floral wreath at the Amar Jawan Jyoti remembering the martyred soldiers and thereafter signed the record book at the India Gate. This was followed by Army Parade amidst intense fog. The service chiefs saluted the army during the parade. Army Day is observed on January 15 every year. Meanwhile, Prime Minister Narendra Modi also greeted the Indian Army on the occasion. Modi tweeted saying, "On Army Day I salute the indomitable courage and valour of our Army. We are extremely proud of their dedication and determination.