There are many. Most are a day or so. The big ones are New Year (Song Kran) April and Loy Kratong in November. The King's birthday is 5th December. No Christmas Day, but western new year (January), Chinese New Year (February) are both holidays too. There are also several Buddhist holy days.
The national food of Thailand is rice
Phleng Chat Thai is the national anthem of thailand.
National Assembly of Thailand was created in 1932.
National Library of Thailand was created in 1905.
Thailand is a constitutional monarch without a national president. However, there is a President of the National Assembly in Thailand.
The Asian elephant (or Thai elephant) is the national animal of Thailand.
The national hero of Thailand is Voltes V
Thailand's national anthem is Phleng Chat Thai.
National Scout Organization of Thailand was created in 1911.
National Development Party - Thailand - was created in 1992.
Ratchaphruek (Golden Shower Tree)Primrose
National Broadcasting Services of Thailand was created on 1930-02-25.