jan 1, 2016 - Signing of the Habana Peace Accords.
The government and the FARC signed an agreement to the 'end of the conflict' including the bilateral ceasefire, cessation of hostilities and surrender of weapons during a ceremony in Havana, Cuba.
People didn't ratified this agreement. It failed with 50.2% voting against it and 49.8% voting in favor.
Added to timeline:
Armed conflict timeline