This is a booking calendar, not a festival guide. Every long weekend on the Thai calendar between September and December 2026 pushes transport demand up before the date itself, drivers and vehicles get booked out, and roads around Bangkok get heavier days before the holiday even starts. This covers exactly which dates to watch and how far ahead to lock in transport for each one, sourced from Thailand’s official 2026 public holiday list.
September 2026, the quiet month
September carries one public holiday, Mahidol Day on Thursday, September 24, marking the birthday of Prince Mahidol, the father of modern Thai medicine. It falls midweek in 2026 and does not create a long weekend on its own. September stays the quietest of the four months covered here for transport demand, a reasonable window for a trip if a flexible schedule matters more than a specific date.
October 2026, two holidays worth planning around
October carries two public holidays that behave very differently for trip planning.
King Bhumibol Memorial Day falls on Tuesday, October 13. A Tuesday holiday does not create an automatic long weekend, though travellers who take the Monday off turn it into a four day stretch, October 10 to 13.
Chulalongkorn Day falls on Friday, October 23. This one creates a built in three day weekend, October 23 to 25, without anyone needing to take an extra day off. Expect this to be the busier of the two dates for transport bookings.
Late October also carries Wan Ok Phansa, the end of Buddhist Lent, a culturally significant date with alcohol sale restrictions in parts of the country, though it is not itself a public holiday day off.
November 2026, no public holiday but heavy travel demand
There is no official public holiday in Thailand in November 2026. Many travellers assume Loy Krathong carries public holiday status, it does not.
Loy Krathong falls on the full moon night of November 24 to 25, 2026, based on the Thai lunar calendar. It draws heavy domestic and international travel to riverside spots in Bangkok, Chiang Mai, and Sukhothai in particular, even without a formal public holiday attached to it. Roads and transport bookings around Bangkok get busy in the days surrounding the festival regardless of the lack of an official day off.
December 2026, the year’s busiest stretch
December carries the most holiday activity of the four months, and the most reason to book transport early.
Father’s Day, marking King Bhumibol’s birthday, falls on Saturday, December 5. Since it lands on a weekend, Monday, December 7 is a substitution holiday, creating a three day weekend, December 5 to 7.
Constitution Day falls on Thursday, December 10. Taking Friday, December 11 off turns this into a four day weekend, December 10 to 13.
New Year’s Eve falls on Thursday, December 31, running into the New Year’s Day holiday and typically the busiest travel window of the entire quarter. Fireworks events across Bangkok and beyond draw heavy demand on both transport and accommodation, see the New Year fireworks guide for where those events happen.
Which weekends to book transport early for
Ranked by how far ahead to lock in a private transfer or day trip, based on how much of a built in long weekend each date creates.
| Date | Holiday | Long weekend | Book by |
| Oct 23 (Fri) | Chulalongkorn Day | Oct 23 to 25, automatic | 3 to 4 weeks ahead |
| Dec 5 to 7 | Father’s Day and substitution | Dec 5 to 7 | 3 to 4 weeks ahead |
| Dec 10 (Thu) | Constitution Day | Dec 10 to 13 with a bridge day | 2 to 3 weeks ahead |
| Dec 31 | New Year’s Eve | Runs into New Year, the year’s busiest window | 4 to 6 weeks ahead |
| Nov 24 to 25 | Loy Krathong, not an official holiday | No automatic long weekend, still heavy travel demand | 2 to 3 weeks ahead |
| Oct 13 (Tue) | King Bhumibol Memorial Day | Oct 10 to 13 if a bridge day is taken | 2 to 3 weeks ahead |
For culture and festival background rather than a booking calendar, Experience Thailand’s festival calendar covers the traditions behind Songkran, Loy Krathong, and Chinese New Year. Songkran and Chinese New Year both fall outside the September to December window here, see the Songkran Bangkok logistics playbook and the Chinese New Year in Thailand guide for those dates specifically.
Booking transport around a long weekend
The pattern holds across every date on this list, book earlier than feels necessary. Vehicles and drivers for the popular long weekend dates get reserved well before the date itself, and a booking made the week of a three or four day weekend runs a real risk of finding standard options already taken.
Go Thai Transport runs private, door to door transport for day trips and longer holiday travel across Pattaya, Hua Hin, Ayutthaya, Kanchanaburi, Khao Yai, the Bangkok Historical Day Trip, the Temples Day Trip, and the Safari Day Trip, plus airport transfers for the flights in and out around each holiday window. Vehicle options run from a standard SUV or Van, see the full fleet lineup, up to Go Thai Prestige for a more comfortable ride. More planning guides sit on the Go Thai Transport travel guide.
Frequently asked questions
What are the public holidays in Thailand in 2026? This guide covers September through December 2026 specifically, Mahidol Day on September 24, King Bhumibol Memorial Day on October 13, Chulalongkorn Day on October 23, Father’s Day on December 5 with a substitution holiday December 7, Constitution Day on December 10, and New Year’s Eve on December 31. Earlier 2026 holidays including Songkran and Chinese New Year are covered in their own dedicated guides.
What are the public holidays in Thailand in September? One, Mahidol Day, falling on Thursday, September 24, 2026. It does not create a long weekend on its own since it lands midweek.
Is 24 September still a public holiday? Yes. September 24 remains Mahidol Day on the 2026 calendar, marking the birthday of Prince Mahidol, regarded as the father of modern medicine and public health in Thailand.
What are the major events in Thailand in 2026, September through December? Mahidol Day in September, King Bhumibol Memorial Day and Chulalongkorn Day in October, Loy Krathong in late November, and a cluster of December holidays running from Father’s Day through Constitution Day into New Year’s Eve.
What events are happening in Thailand in September 2026? September stays quiet on the events calendar, with Mahidol Day on September 24 as the month’s one notable date. It is a lower demand month for transport and accommodation compared with the months either side of it.
What events are happening in Thailand in October 2026? King Bhumibol Memorial Day on October 13 and Chulalongkorn Day on October 23, the second of which creates an automatic three day weekend from October 23 to 25. Wan Ok Phansa, the end of Buddhist Lent, also falls in late October.
Is October a good month to visit Thailand? October sits in the tail end of the rainy season, with two public holidays and one built in long weekend around Chulalongkorn Day. It works well for a trip timed around that October 23 to 25 weekend, with the trade off of booking transport and accommodation earlier than a quieter month would need.
What festivals are happening in Thailand in November 2026? Loy Krathong, falling on the full moon night of November 24 to 25, 2026. It is Thailand’s floating lantern festival, widely celebrated along rivers and lakes in Bangkok, with especially large celebrations in Chiang Mai and Sukhothai.
What date is the Lantern Festival in Thailand in 2026? November 24 to 25, 2026, timed to the full moon of the twelfth month in the Thai lunar calendar. Chiang Mai’s Yi Peng sky lantern releases typically run alongside Loy Krathong on the same dates.
Are there any Thai holidays in November? No official public holiday falls in November 2026. Loy Krathong is a major cultural festival on the same month, not a government designated day off, though it still drives heavy travel demand around its dates.
What festival is happening in Thailand in December 2026? December runs more on public holidays than festivals, Father’s Day on December 5, Constitution Day on December 10, and New Year’s Eve on December 31. New Year’s Eve carries the closest thing to a festival atmosphere, with fireworks events across Bangkok drawing large crowds.
Which weekends should I book transport early for in late 2026? Chulalongkorn Day on October 23 to 25 and the New Year’s Eve stretch at the end of December carry the heaviest demand, worth booking three to six weeks ahead. Constitution Day in mid December and the Father’s Day weekend in early December are next in line, worth two to four weeks of lead time.
Book ahead of the next long weekend
Go Thai Transport handles private transfers and day trips across Bangkok and nearby provinces, with standard SUV and Van options or the upgraded Go Thai Prestige fleet. See reviews from past guests, then share your dates on WhatsApp early, especially for any of the long weekends above.