Thai lunar calendar

The Thai lunar calendar (Thai: ปฏิทินจันทรคติ, rtgs: patithin chanthrakhati, pronounced [pà.tì.tʰīn tɕān.tʰrá.kʰā.tìʔ], literally, Specific days according to lunar norms), or Tai calendar, is a lunisolar Buddhist calendar. It is used for calculating lunar-regulated holy days. Based on the SuriyaYatra, with likely influence from the traditional Hindu Surya Siddhanta, it has its own unique structure that does not require the Surya Siddhanta to calculate. Lunisolar calendars combine lunar and solar calendars for a nominal year of 12 months. An extra day or an extra 30-day month is intercalated at regular intervals.

Legal v. religious calendar

The Thai solar calendar (Thai: ปฏิทินสุริยคติ, rtgs: patithin suriyakhati,  [pà.tì.tʰin sù.rī.já.kʰā.tìʔ]), Thailand's version of the Gregorian calendar, replaced the patithin chanthrakhati in AD 1888 / 2431 BE for legal and commercial purposes. In both calendars, the four principal lunar phases determine Buddhist Sabbaths (Uposatha), obligatory holy days for observant Buddhists. Significant days also include feast days.

Note that the Thai and the Chinese lunar calendars do not directly correspond. Thai Chinese likewise observe their Sabbaths and traditional Chinese holidays according to solar terms, two of which correspond to one lunar phase. These also move with respect to the solar calendar, and so it is common for Thai calendars to incorporate both Thai and Chinese lunar calendar-based events.

Mundane astrology also figures prominently in Thai culture, so modern Thai birth certificates include lunar calendar dates and the appropriate Thai Zodiacal animal year-name for Thai Hora (Thai: โหราศาสตร์, rtgs: horasat). The Thai Zodiac is similar to the Chinese, though the Dragon is replaced by the Naga or large snake (งูใหญ่), and in Northern Thailand the Pig is occasionally replaced with an Elephant.

Thai-Birth-Certificate-Solar-Lunar-Zodiac

Years

Further information: Chula Sakarat, Lunar phase and Solar term

To keep the years in sync with the seasons, Thai lunar years may add a day to the 7th month or repeat the 8th month. Therefore, years may have one of three lengths – 354, 355 or 384 days – yet retain a nominal length of twelve months.

AD 2004/2547BE Extra lunar month ended August 15

New year

The Thai lunar calendar does not mark the beginning of a new year when it starts a new 1-to-12 count, which occurs most frequently in December.

August 1 and 2, 2004. Sunday, a holiday, on the left, and Monday, observed as the compensatory day, on the right

The Thai solar calendar determines a person's legal age and the dates of secular holidays, including the civil new year and the three days of the traditional Thai New Year, which begin the next Twelve-year animal cycle. Should the holidays fall on a weekend, it also accommodates these as well as some of the principal lunar festivals with a compensatory day off (Thai: วันชดเชย, rtgs: wan chotchoei).

Twelve-year animal cycle

Further information: Chinese zodiac

13 April of the solar calendar occasions the beginning of the traditional Thai New Year (Songkran) and is the day that a year assumes the name of the next animal in the twelve-year animal cycle;[1] Thai Chinese communities may observed the name-change earlier in accordance with the Chinese New Year.

Gregorian year Chinese New Year's Day Thai beginning 13 April Animal
1998 Jan 28 Khan
(ขาล) 		虎 Tiger
1999 Feb 16 Tho
(เถาะ) 		兔 Rabbit
2000 Feb 5 Marong
(มะโรง) 		龍 Dragon
2001 Jan 24 Maseng
(มะเส็ง) 		蛇 Snake
2002 Feb 12 Mamia
(มะเมีย) 		馬 Horse
2003 Feb 1 Mamae
(มะแม) 		羊 Goat
2004 Jan 22 Wok
(วอก) 		猴 Monkey
2005 Feb 9 Raka
(ระกา) 		雞 Rooster
2006 Jan 29 Cho
(จอ) 		狗 Dog
2007 Feb 18 Kun
(กุน) 		豬

Pig

2008 Feb 7 Chuat
(ชวด) 		鼠 Rat
2009 Jan 26 Chalu
(ฉลู) 		牛 Ox
2010 Feb 14 Khan
(ขาล) 		虎 Tiger
2011 Feb 3 Tho
(เถาะ) 		兔 Rabbit
2012 Jan 23 Marong
(มะโรง) 		龍 Dragon
2013 Feb 10 Maseng
(มะเส็ง) 		蛇 Snake
2014 Jan 31 Mamia
(มะเมีย) 		馬 Horse
2015 Feb 19 Mamae
(มะแม) 		羊 Goat
2016 Feb 08 Wok
(วอก) 		猴 Monkey

Months

In the modern Thai calendar, months (Thai: เดือน, rtgs: duean,  [dɯ̄an], meaning "month" or "Lunation") are defined by lunar cycles. Successive months (or lunations) are numbered from 1 to 12 within the Thai year. As in other Buddhist calendars, these months have names that derive from Sanskrit, but for the most part are only known by Thai astrologers.[2]

Two successive lunations take slightly more than 59 days. The Thai lunar calendar approximates this interval with "normal-month" pairs (ปกติมาส, rtgs: pakatimat) that are alternately 29 and 30 days long. 29-day "hollow months" (เดือนขาด, rtgs: duean khat,  [dɯ̄an kʰàːt]) are odd-numbered (เดือนคี่, rtgs: duean khi,  [dɯːan.kʰî]); 30-day "full months" (เดือนถ้วน, rtgs: duean thuan,  [dɯ̄an tʰûan]) are even-numbered (เดือนคู่, rtgs: duean khu,  [dɯ̄an kʰûː]).

To keep the beginning of the month in sync with the new moon, from time to time either the normally "hollow" Month 7 takes an extra day, or an extra "full" Month 8 follows a normal "full" Month 8.

Months 1 and 2 are named in archaic alternate numbers, with the remainder being named in modern numbers.[2]

Months 1 – 6

Month 1, "duean ai" (เดือนอ้าย,  [dɯ̄an ʔâːj]), begins the cycle of counting the months anew, most frequently in December, but does not signify the beginning of a new year.[2] ai, an archaic word in Thai but not in other dialects, means first.[3] An odd-numbered hollow month, it is 29 days long.

Month 2, "duean yi", (เดือนยี่,  [dɯ̄an jîː], from archaic ญี่ meaning 2)[3] is an even-numbered full month.

Months 3–6, "duean 3–6", use the modern reading of Thai numerals, as do all remaining months. Months 3–6, alternate between 29-day hollow months and 30-day full months.

Month 7 and athikawan

Month 7, "duean 7", a hollow month is normally 29 days long in years of 354 days, but adds an extra day (อธิกวาร rtgs: athikawan) when required for 355-day-long years (ปีอธิกวาร, rtgs: pi athikawan).

Month 8

The eighth month, "duean 8", is a 30-day full month.

Month 8/8 "athikamat"

Athikamat (อธิกมาส, Thai pronunciation: [à.tʰí.kà.mâːt])) is the extra month needed for a 384-day-long pi athikamat (extra-month year; ปีอธิกมาส, Thai pronunciation: [pī.à.tʰí.kà.mâːt]). Month 8 repeats as เดือน ๘/๘ or Month 8/8, variously read as "duean paet thab paet" (เดือนแปดหลัง)

Months 9 – 12

Months 9–12, "duean 9–12", complete the lunar cycle.

Month divisions

Months divide into two periods designated by whether they are waxing or waning:

Weeks

A week is called Sapda/Sappada (Thai: สัปดาห์,  [sàp.dāː, sàp.pà.dāː]). The term is defined by the Royal Institute Dictionary (RID) as a 7-day period beginning on Sunday and ending Saturday.[4] When referring to lunations, however, it is the 7-, 8- or (rarely) 9-day interval between quartile lunar phases; that is, from one วันพระ to the next.

Days

While solar-calendar weekdays have names, lunar-calendar days number sequentially from 1 to 14 or 15 in two segments depending on whether the moon is waxing or waning. For example, "raem 15 kham duean 12 แรม ๑๕ ค่ำ เดือน ๑๒" means "Waning of the 15th Night of the 12th Lunar Month".

Kham ค่ำ , evening, is considered to be the evening of the common day that begins and ends at midnight, rather than of a day that begins and ends at dusk. Past practice may have been different.

Named lunar days

Holidays regulated by the moon

Buddhist Sabbaths, colloquially called วันพระ, are the New, First-quarter, Full, and Third-quarter Moon-days. These are not normally days off (วันหยุด), except for butcher, barber, and beautician shops that observe the Eight Precepts. Annual holidays and seasonal festivals collectively are called วันนักขัตฤกษ์.

Festivals or fairs are called เทศกาล; these may be further styled as ประเพณี "traditional" and as Thai: พิธี, "rite" or "ceremony". The table shows the principal ones governed by the moon in yellow.

Work holidays prescribed by the government are called Thai: วันหยุดราชการ; those regulated by the moon are red.

Weekends are normally days off; if a holiday normally observed by a day off falls on a weekend, the following Monday is a compensatory day off Thai: วันชดเชย.

Work holidays and festivals regulated by the moon: x = waxing moon; n = waning
Mo. Day Event ไทย Comment
3† 1x Chinese New Year ตรุษจีน Most shops owned by Chinese-Thai close
3 15x Magha Puja วันมาฆบูชา Makha Bucha
6 15x Vesak วิสาขบูชา Wisakha Bucha
8‡ 15x Asalha Puja อาสาฬหบูชา Asanha Bucha
8‡ 1n Wan Khao Phansa วันเข้าพรรษา Begin Rains Retreat, or "Buddhist Lent"
10 15n Thetsakan Sat เทศกาลสารท The Vegetarian Festival (เทศกาลวันสารท)[5] now appears on calendars as thetsakan kin che kao wan (เทศกาลกินเจเก้าวัน), (begin) Nine-day Vegetarian Festival. Kin Jae [6] means (to vow) in the manner of Vietnamese or Chinese Buddhists to eat a strict vegetarian diet. (เทศกาลกินเจ)
11 15x Wan Ok Phansa วันออกพรรษา End Rains Retreat, or "Buddhist Lent"
11 1n Thot Kathin ทอดกฐิน Presentation of Monk's Robes after Rains Retreat
12 15x Loi Krathong ลอยกระทง Note that Loi Krathong dates are based on the Lanna (Northern Thailand) Lunar Calendar which is two months later than the Thai Lunar Calendar. Loy Krathong is actually on the second month of the Lanna calendar which is the 12th month of the central Thai calendar.

Notes:

† The Chinese New Year uses different methods of determining intercalary months, so this festival sometimes occurs a month earlier or later.
‡ Month 8/8 in years with the extra month.

Thai year vocabulary

Thai orthography spells most native words phonetically, though there is no definitive system for transcription into Roman letters. Here, native Thai words are immediately followed by a vocabulary entry in this pattern:

Phonetic Thai (Thai phonetic respelling, if different) [Comment] definition; variant definitions.

Example:

Thai ไทย (ไท) [Archaic] free, frank; Thai race, language, alphabet ; citizen of Thailand.

Sanskrit loan words follow different rules [the way English grammatical rules vary for words of Greek and Latin origin ('ph-' in 'phonetic' being pronounced /f/, for example.)] Entered below in order of first appearance, these vocabulary entries are in this pattern:

Sanskrit สันสกฤต (สันสะกฺริด /san-sa-krit/)  

Literally means "self-made" or "self-done", or "cultured" in a modern usage (which implies the language of cultured persons); Sanskrit alphabet, language, writing; [presumed] compound of

Chanthrakhati จันทรคติ (จันทฺระคะติ) 
"Lunar norms", Lunar Calendar; compound of
Patithin ปฏิทิน (ปะติทิน) 
Calendar; compound of
Patitin Chanthakhati ปฏิทินจันทรคติ (ปะติทินจันทระคะติ) 
"Specific days according to lunar norms", Lunar Calendar
Suriyakhati สุริยคติ (สุริยะคะติ) 
Solar norms, Solar Calendar; compound of
Prokkatimat ปรกติมาส (ปฺรกกะติมาด) 
normal month; compound of
Athikamat อธิกมาส (อะทิกะมาด) 
month added in leap-month lunar years
Athikawan อธิกวาร (อะทิกะวาน) 
day added in leap-day lunar years; compound of
Athikasurathin อธิกสุรทิน (อะทิกะสุระทิน) 
day added to February in a solar leap year.

See also

Wikisource has original text related to this article:

References

  1. ↑ 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 originally occurred at the beginning of the 5th lunar month, a few days before Songkhran.
  2. 1 2 3 Diller, Anthony; Preecha Juntanamalaga (2000). "Thai Time". Faculty of Asian Studies Australian National University. p. 25. Archived from the original on 2002-01-10. Retrieved 2008-05-08. (5.1) ...names would be known only by Thai astrologers (Prasert Na Nagara 1998:524).
  3. 1 2 On-line Royal Institute Dictionary (ORID - 1999).
  4. ↑ RID on-line
  5. ↑ สารท ๑
  6. ↑ กินเจ

Further reading

External links

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