The 100th anniversary commemorates the district which played an important part in preventing the country being colonized by the British during king Rama the 5th’s rule.On the video channel of The Nation, it also has a video on the celebrations.
But much more interesting than the celebrations is the actual history of the district and the events which led to the creation of the district in 1909. On March 10 1909 the Anglo-Siamese Treaty was signed, which finalized the boundary between Siam and the British colony Malaysia. The area of Tak Bai belonged to the Mueang Kelantan, but since the boundary was chosen to run along the Kolok river this part of Kelantan became part of Mueang Bang Nara, the old name of Narathiwat province. In August the territorial administration of the area was defined. Published on August 22 in the Royal Gazette was an announcement titled ประกาศกระทรวงมหาดไทย ประกาศตั้งอำเภอสะเดาและอำเภอตากใบ, which was signed on August 12. Sadly it does not state on which day it became effective, but since the celebrations ended on August 10 it must have been few days before the announcement was signed.
Those who can read Thai will notice, that together with Tak Bai also the district Sadao was established, as here part of Mueang Saiburi (Kedah) was added to Songkhla. But I am not aware of any celebration in there, but since it was announced at same date it should have its anniversary at the same time.
According to the data I have, the next district to celebrate its 100th anniversary is Rueso, also in Narathiwat, which was created as a minor district on September 24 1913 [Gazette]. If however only the full district status counts, then the next are already next month - Wiang Sa and Rong Kwang were upgraded from minor districts to full districts on September 12 1909 [Gazette].