Title and ranks
Her formal name and title is Somdet Phra Nang Chao Sirikit Phra Borommarachininat 'Her Majesty Queen Regent Sirikit'. Her official title is Queen Sirikit.
At present, the queen ranks as Field Marshal, Admiral of the Fleet and Marshal of the Royal Thai Air Force, usually mentioned in official documents that: Chom Phon Ying Chom Phon Ruea Ying Chom Phon Akat Ying Somdet Phra Nang Chao Sirikit Phra Borommarachininat 'Her Majesty Queen Regent Sirikit, the Field Marshal, Admiral of the Fleet and Marshal of the Royal Thai Air Force'. The queen holds ceremonial supreme power, after her husband who ranks as the Head of the Royal Thai Armed Forces, among the Royal Thai Army.
12 August 1932 – 28 April 1950: The Honourable (English style) or Mom Rajawongse (Thai style) Sirikit Kitiyakara
28 April 1950 – 5 December 1956: Her Majesty Queen Sirikit of Thailand
5 December 1956 – present: Her Majesty Queen Sirikit, Queen Regent of Thailand
In 1976, the Thai government honored the queen by declaring her birthday a national holiday. Her Majesty the Queen's Birthday is celebrated on 12 August each year.