Sources: Bangkok Post and Thailand Public Holidays. The date of this year's Royal Ploughing Ceremony will be Thursday, May 10, 2007. This civil servants' public holiday, which celebrates the beginning of the rice planting season shall, as usual, be held under Royal patronage in Bangkok.
Analysis: This is an ancient Brahman ceremony, usually held in the first half of May, whose is selected by Brahmin Priests according to their astrological calendars. Out of the 3800+ public holidays, in 240 countries, that our predictive rules database covers, this public holiday, and the Umhlanga, or Reed Dance, Ceremony of Swaziland, are the only 2 whose long-term prediction always causes us headaches. If anyone has any reliable tips or information about the manner in which the date of this public holiday is arrived at, please contact us.