January 29 – the CC published drafting a new constitution and forwarded it to the NRC for approval.
February
March
April
May
June
June 9 – 70th Anniversary Celebrations of Bhumibol Adulyadej's Accession.
July
August
September
October
October 13 – King Bhumibol Adulyadej dies at Siriraj Hospital in Bangkok the age of 88 after 70 years of reign. One year period of mourning was declared the following day. His only son, Crown Prince Maha Vajiralongkorn, became Thailand's new monarch.