The Thai market is closed today because of Chakri Day yesterday. So what is Chakri Day?

Chakri Day commemorates the founding of the Chakri Dynasty in 1782 by King Rama I. In the new capital city of Bangkok, King Rama I built the Grand Palace that now houses the Emerald Buddha. In addition, he helped release Thailand from the Burmese control, after Ayutthaya succumbed 14 years earlier.

Source: Royal Thai Consulate