May 5 - At least 13 people are killed and dozens of others are declared missing as a result of a Nepal flash flood after a mountain river burst its banks.[1]
May 14 - An Agni Air flight carrying 21 people crashes while trying to land at Jomsom Airport in mountainous northern Nepal. Indian child actress Taruni Sachdev is among the 15 people killed.[2][3]
May 16 - British musician Oz Bayldon, representing Music4children, establishes a Guinness World Record by performing the highest concert on land, at 6,676 m (21,246 ft), on Mera Peak.[4]
May 28
Political parties in Nepal fail to agree on a new constitution, leaving the country with no constitution and no sitting national Legislature.[5]
The first Racemandu motorcycle racing event is organized.[6]
May 31 - Supreme Court Justice Rana Bahadur Bam is assassinated in Lalitpur.[7]
September 6 - The United States removes the Unified Communist Party of Nepal (Maoist) from their terror list, citing "a credible commitment to pursuing peace and reconciliation". In June, a group around party vice-president Mohan Baidya announced a split in the party.[8]