Thailand's Prime Minister Prayut Chan-o-cha has declared one-year mourning for the king Bhumibol Adulyadej. The mourning will officially enter into force on 14 October for all the officials, reports the RBK. In addition, all the citizens of Thailand are urged to mourn 30 days for the king. All the celebrations will be postponed during this period; the flags will be lowered in the state institutions. The King of Thailand passed away at the age of 89. He ruled the country since 1946 and was the king who reigned the longest in the history of the monarchy.