The 12 August is a double celebration in Thailand as it is national Mother’s Day and also the birthday of Queen Sirikit. The queen and mother of current king King Vajiralongkorn will celebrate her 85th birthday. Thais typically celebrate the day by putting up portraits of the queen and joining parades at local district offices.
The day is expected to be more low key this year as Thailand is still in mourning for King Bhumibol Adulyadej who passed away last October. In 2017, the 12 August is a Saturday which means Monday the 14 will be the official public holiday.
Banks and post offices as well as government and provincial immigration offices will be shut on Monday. This closure does not apply to the bureau de change offices of banks or immigration checkpoints at airports or land border crossings.
The 12 August has been Mother’s Day in Thailand since 1976. Prior to that, it was on the 15 April and at the same time as the annual Songkran Festival. Thailand had adopted the Western custom of honouring mothers with a special day in 1950.