Thai solar calendar
The Thai solar calendar, Suriyakhati (Thai: สุริยคติ), was adopted by King Chulalongkorn (Rama V) in AD 1888 as the Siamese version of the Gregorian calendar. It is the legal calendar in Thailand, though Thai lunar calendar dates continue in use. Years are now counted in the Buddhist Era (BE: พ.ศ. พุทธศักราช, pútthasàkkàrât) which began 543 years before the Christian Era ( ค.ศ. คริสต์ศักราช, krítsàkkàrât). As a convenience, calendars typically include the year AD in both Arabic and Thai numerals.
- Red numerals mark Sundays and public holidays in Thailand.
- Buddha images mark Buddhist Sabbaths, Wan Phra (วันพระ).
- Red tablets with white Chinese characters mark the New and Full Moons of the Chinese calendar, which typically differ by one day from those of the Thai.
- Scrawled blue figures mark dates of national lottery drawings and it's made for predict number for last 3 digit and 2 digit prize (for example, 078 on the 15th, 538 on the 19th and 2576 on 31 August 2004.)
- Thai lunar calendar dates appear below the solar calendar date.
Mundane astrology figures prominently in Thai culture, so modern Thai birth certificates include lunar calendar dates, and the appropriate Chinese calendar zodiacal animal year-name for both Thai Hora (โหราศาสตร์, ho-ra-sat) and Chinese astrology. Thai birth certificates record the date, month and time of birth, followed by the day of the week, lunar date, and the applicable zodiac animal name. Thai traditionally reckon age by the 12-year animal-cycle names, with the twelfth and sixtieth anniversaries being of special significance; but the official calendar determines age at law.
For instance, 12 August 2004 was observed without regard to the lunar date as Queen Sirikit's birthday, a public holiday also observed as Thai Mothers' Day. Her zodiacal animal is the Monkey and her traditionally significant sixtieth anniversary year was 1992. Born on a Friday, her auspicious birthday colour is blue. Thai auspicious colours of the day are given in the table of weekdays, followed below it by a link to the Buddha images for each day of the week.
The Siamese generally used two calendars, a sacred and a popular (vulgar in the classical sense). The vulgar or minor era (จุลศักราช, chula sakarat) was thought to have been instituted when the worship of Gautama was first introduced,  and corresponds to the traditional Burmese calendar (abbreviated ME or BE, the latter not to be confused with the abbreviation for the Buddhist Era, which is the sacred era.)
King Chulalongkorn decreed a change in vulgar reckoning to the Rattanakosin Era (abbreviated RE) (รัตนโกสินทรศก, Rattanakosin Sok abbreviated ร.ศ. and R.S.) The epoch (reference date) for Year 1 was 6 April 1782 with the accession of Rama I, the foundation of the Chakri Dynasty, and the founding of Bangkok (Rattanakosin) as capital in 106 RE, AD 1888.
In Thailand the sacred, or Buddhist Era, is reckoned to have an epochal year 0 from 11 March 543 BC, believed to be the date of the death of Gautama Buddha. King Vajiravudh (Rama VI) changed year counting to this Buddhist Era (abbreviated BE) and moved the start of the year back to 1 April in 2455 BE, AD 1912. As there is no longer any reference to a vulgar or popular era, the Common Era may be presumed to have taken the place of the former.
New Year, the time at which a new calendar year begins and the calendar's year count is incremented, originally coincided with the date calculated for Songkran, when the sun transits the constellation of Aries, the first astrological sign in the Zodiac as reckoned by sidereal astrology: thus the year commenced on 11 April 1822. As previously noted, Rama VI moved the start of the year back to 1 April in 2455 BE, AD 1912.
On 6 September 1940, Prime Minister Phibunsongkhram decreed 1 January 1941 as the start of the year 2484 BE, so year 2483 BE had only nine months. To convert dates from 1 January to 31 March prior to that year, the number to add or subtract is 542; otherwise, it is 543. Example:
Today, both the Common Era New Year's Day (1 January) and the traditional Thai New Year (สงกรานต์, Songkran) celebrations (13–15 April) are public holidays in Thailand. In the traditional Thai calendar, the change to the next Chinese zodiacal animal occurs at Songkran (now fixed at 13 April.) For Thai Chinese communities in Thailand, however, the Chinese calendar determines the day that a Chinese New Year begins, and assumes the name of the next animal in the twelve-year animal cycle.
Names of the months derive from Hindu astrology names for the signs of the zodiac. Thirty-day-month names end in -ayon (-ายน), from Sanskrit root āyana : the arrival of; 31-day-month names end in -akhom (-าคม), from Sanskrit āgama (cognate to English "come") that also means the arrival of.
February's name ends in -phan (-พันธ์), from Sanskrit bandha : "fettered" or "bound". The day added to February in a solar leap year is Athikasuratin (อธิกสุรทิน, respelled to aid pronunciation (อะทิกะสุระทิน) from Sanskrit adhika : additional; sura : move).
|English name||Thai name||Abbr.||Thai Pronunciation||Sanskrit word||Zodiac sign|
|January||มกราคม||ม.ค.||mákàraa-khom, mókkàraa-khom||makara "sea-monster"||Capricorn|
|February||กุมภาพันธ์||ก.พ.||kumphaa-phan||kumbha "pitcher, water-pot"||Aquarius|
|March||มีนาคม||มี.ค.||miinaa-khom||mīna "(a specific kind of) fish"||Pisces|
|June||มิถุนายน||มิ.ย.||míthùnaa-yon||mithuna "a pair"||Gemini|
|December||ธันวาคม||ธ.ค.||thanwaa-khom||dhanu "bow, arc"||Sagittarius|
|English name||Thai name||Thai Pronunciation||Color||Sanskrit word||Planet|
Note: Colours are those considered auspicious for the given days of the week, that of Wednesday day being green and of Wednesday night, light green. Of Buddha images representing episodes (ปาง) from his life, there is one that represents a week and others for each day of the week: Monday has three options that are similar and Wednesday, entirely different ones for day and night.
Thai representations of the planets in deity form are below:
Weekends and holidays
Saturdays and Sundays (Thai: เสาร์-อาทิตย์ sao athit) are observed as legal non-workdays (วันหยุดราชการ, wan yut ratchakan) and are generally shown on calendars in red, as are public holidays. Since 1996 and subject to declaration by the Cabinet of Thailand, public holidays that fall on weekends are followed by Substitution days (วันชดเชย, wan chot choei) generally shown in a lighter shade of red, as shown above for Monday, 2 August 2004. Buddhist feasts that are public holidays are calculated according to the Thai lunar calendar, so their dates change every year with respect to the solar calendar. Chinese New Year and other feasts observed by Thai Chinese vary with respect to both, as these are calculated according to the Chinese calendar.
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- Buddhist calendar
- Public holidays in Thailand
- Thai 6-hour clock
- Thai lunar calendar
- Time in Thailand
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The Siamese year does not commence with the first month, but corresponds with that of the Chinese. In the year 1822, the new year fell on the 11th of April, being the 5th day of the dark half of the moon.... The Siamese have two epochs, or, as they describe them, Sa-ka-rat. The sacred one dates from the death of Gautama, and the year which commenced on the 11th of April, 1822, was the year 2365, according to this reckoning.
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The Siamese have two epochs, sacred and popular. The sacred era dates from the death of Gautama, and the year 1833 corresponded to the 2376 year. The vulgar era was instituted when the worship of Gautama was first introduced; and the year 1833 corresponded with the year 1194, and was the fifth, or Dragon year.Check date values in:
- พระราชบัญญัติปีปฏิทิน พุทธศักราช ๒๔๘๓ (PDF). Royal Gazette (in Thai) 57 (0 ก): 419. 1940-09-17.
- J.C. Eade. The calendrical systems of mainland southeast asia. E.J. Brill, Leiden. p. 22. ISBN 90-04-10437-2. According to some scholars including George Coedes the change occurred at the beginning of the 5th lunar month originally a few days before Songkhran.
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An innovation of the Ayutthaya period.
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- na Nakorn, Bleung (comp.). . นายเปลื้อง ณ นคร ผู้รวบรวม ปทานุกรมนักเรียน ไทยวัฒนาพานิช กทม. Student's Handbook. Bangkok: Thai Wattana Panit, 2514.
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