International School Term Dates in Thailand: What to Expect

There is no single Thailand-wide school calendar. Here's how international school term dates actually work, how they differ from the Thai national calendar, and why you must always check the specific school's own dates before you plan a move.

International schools in Thailand

Quick answer

International school term dates in Thailand: the usual August to June year, term and holiday timings, exam periods, and how to plan a family relocation.

At a glance

Why there is no single Thailand school calendar

One of the most common misunderstandings among relocating families is assuming that Thailand has one school year that every school follows, the way a national curriculum country might. It does not. Thailand actually has two distinct calendar traditions running alongside each other, and international schools sit largely — but not entirely — in one of them.

Most international schools in Thailand run an August-to-June academic year, broadly mirroring the northern-hemisphere pattern familiar from the UK, continental Europe and much of the US independent sector. The Thai national and Thai-programme school system, by contrast, conventionally runs its academic year from mid-May to March, split by the hot-season break around the turn of the calendar year. These are genuinely different calendars, not the same calendar described differently, and they do not line up.

This matters practically the moment a family's situation touches both systems: a bilingual school that blends an international and a Thai programme, a household with children in both an international school and a local school, or a family transferring from a Thai-affiliated school into a fully international one. In every one of these cases, the two calendars can be running weeks apart, with different holiday windows and different start and end points. Never assume one school's calendar because a nearby school, or a school in another Thai city, follows it. Every claim in this guide about "most schools" is a pattern, not a promise, and the school's own published calendar is the only reliable source.

Terms vs semesters: the two structures you'll meet

Two structures, in general terms

Within the August-to-June international-school calendar, schools organise the year in one of two broad ways, and which one a school uses is usually a strong clue to its overall academic tradition. British-curriculum schools in Thailand typically divide the year into three terms — commonly autumn, spring and summer — each around twelve to fourteen weeks and usually broken by a half-term holiday roughly midway through. American-curriculum and many IB schools more often use two semesters, each split by a shorter mid-semester break, with the year sometimes further divided into quarters for reporting purposes.

Neither structure is better; they simply reflect different academic traditions and, in the case of exam-oriented years, different assessment calendars behind them. What matters for a parent comparing two schools is that "the spring term" at a British-pattern school and "semester two" at an American-pattern school do not start or finish on the same dates, do not take their holiday breaks at the same point, and may not even total the same number of teaching weeks before the first major assessment point. If you are weighing up two schools with different curricula, ask each one directly for its term or semester dates rather than assuming they align, especially in the first term after a move.

What a typical holiday shape looks like — described generally

Rather than list specific dates, it is more useful to understand the shape most international-school calendars in Thailand share, so you can sanity-check a school's published dates when you see them and know roughly what to expect from any given term.

Most schools build in a longer break at the end of the calendar year spanning the Christmas and New Year period, a shorter break in the northern hemisphere spring, and the long summer break between academic years, which is when most families travel furthest and for longest. Within each term or semester there is typically at least one shorter break — a half-term in the three-term pattern, or a mid-semester break in the two-semester pattern — usually a week or so, sometimes less.

On top of this underlying shape, individual Thai public holidays and observances are layered in. Practice on these varies by school: some close entirely on a Thai public holiday, some treat certain observances as ordinary school days, and some build in an additional short closure around a specific local or national event. None of this is standardised across the sector, and it is exactly the kind of detail a school's own calendar — or a future city-specific guide — is best placed to confirm.

Thai public holidays and school closure practice

Thailand observes a number of national public holidays and religious or royal observances through the year, and schools vary in how they treat them. Some fall on dates set by the Buddhist lunar calendar and therefore move from year to year rather than sitting on a fixed date, which is one reason a school's calendar must be issued fresh each academic year rather than assumed to repeat.

International schools generally close for the most widely observed national holidays, but the exact list a given school treats as a closure day, versus a normal teaching day, varies. Some schools also close briefly around major local festivals even where these are not formal national holidays, particularly in cities where the festival has significant local impact on transport and daily life. If a specific date matters to your planning — a flight already booked, a family event, a visa appointment — do not infer the school's position from a general list of Thai public holidays; check the school's own calendar or ask admissions directly.

How the calendar affects admissions timing and natural entry points

A school's calendar shape has a direct, practical effect on when it is easiest to get your child into a new class. Most international schools in Thailand treat the start of the academic year, in August, as the natural and largest entry point, because that is when a full cohort turns over together, new classes form, and the greatest number of places open at once.

Other entry points exist and are used every year by relocating families, but they behave differently. Starting at the beginning of a new term or semester — after the winter break, or after the spring break — is usually the next most comfortable point, because the class has at least reached a natural pause in its teaching cycle. Starting mid-term, by contrast, means joining a class partway through a unit of work, a marking period, or a set of internal assessments already under way, which is manageable for most younger children but can be genuinely disruptive for older ones.

This is one of the strongest practical reasons to get a school's calendar early in your planning, well before you fix a moving date, house-hunting trip or notice period with a current employer. For more on how the admissions process itself works alongside these entry points, see our guide to how to apply to an international school in Thailand.

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Examination years: why the calendar matters even more

For families with a child in an examination year — IGCSEs, A-levels, the IB Diploma, or AP courses — the school calendar stops being a scheduling convenience and becomes something closer to a risk register. Public examinations in every one of these systems are set on fixed external timetables that schools cannot move, and a school's internal calendar of mock exams, coursework deadlines and internal assessment windows is built backwards from those fixed points.

A mid-year move into an examination year is one of the riskiest transitions a family can make, for reasons that have nothing to do with a child's ability. Coursework and internal assessment components in the IB Diploma and in many IGCSE and A-level subjects are completed progressively across the year, sometimes starting in the first term. A student arriving in the second term may have missed the start of coursework the receiving school cannot easily backfill, or may be joining a syllabus sequence at a different point from the one they left. Subject choices made at another school may not map cleanly onto what the new school offers in that year group, and by the exam year itself, changing some subjects is no longer realistically possible.

If a mid-year move during an examination year is genuinely unavoidable, involve both schools directly and as early as possible — the sending school and the receiving school — and ask specifically about coursework already completed, syllabus alignment, and whether the receiving school can accommodate the subject combination your child is partway through. This is a conversation for subject leaders and heads of year, not just the admissions office.

Planning a relocation around a school's calendar

Once you have a shortlist of schools, request each one's current academic year calendar before you commit to a moving date. This single document should tell you the term or semester dates, the half-term or mid-semester breaks, the main holiday periods, and — where the school publishes it — the dates of any internal exam or assessment weeks. Treat it as one of the core planning documents for the move, alongside the offer letter and the fee schedule.

A relocation that lands a family in the middle of an academic term, rather than at its start, tends to be harder on everyone: the child joins a class where routines, friendship groups and, at secondary level, syllabus content are already established, and the parents are simultaneously managing housing, visas and work in an unfamiliar city without the structure a term start provides. Where you have any choice over the exact moving date, arriving a little before a term begins — even by a couple of weeks — generally gives a smoother settling-in period than arriving after it has started.

If your notice period, visa timeline or housing search genuinely cannot be shaped around a term start, say so to the school early. Admissions teams deal with mid-term arrivals regularly and can tell you honestly how disruptive it is likely to be for your child's specific year group and subjects, rather than you having to guess. For the practical mechanics of applying and being offered a place once you have settled on timing, see our guide to how to apply to an international school in Thailand.

Fitting family travel and home-country visits around a different calendar

One of the more underestimated adjustments for relocating families is that a Thailand-based international-school calendar will not necessarily line up with school holidays back in a grandparent's or home country. A family moving from the UK, where school holidays are set by local authority and tend to cluster in fixed national windows, may find that a Thailand school's half-term or mid-semester break falls in a completely different week — and vice versa for the long summer break, where the timing can differ by several weeks depending on the school and the home country's own system.

This has real cost implications. Flights booked to coincide with a home-country school holiday, when the Thailand-based school is not on holiday at all, either mean pulling a child out of school for travel or paying premium fares to travel only within the narrower Thailand holiday window. Families with children in different systems — one child in a Thailand international school, another still finishing a term in the home country before joining later, for instance — face this most acutely and benefit from mapping both calendars against each other as early as possible, ideally before flights are booked for the first full year.

Extended family visits work the same way in reverse: grandparents planning to visit during "the summer holidays" from their own frame of reference may arrive during term time in Thailand, or miss a window that has already passed. Sharing the school's calendar with extended family early avoids this kind of mismatch.

Bangkok Patana School — an international school in Bangkok
Bangkok Patana School, Bangkok

Weather, seasons and how they shape the school year

Thailand's climate follows a broad pattern of a cooler dry season, a hot season, and a rainy season, and while this does not dictate term dates in the way public holidays do, it does influence how schools schedule some activities within the calendar. Sports days, outdoor events, field trips and some off-site activities are more commonly scheduled during the cooler months where a school has flexibility to choose, and residential trips or camps are sometimes timed to avoid the wettest part of the rainy season in a given region.

This is a general pattern rather than a rule, and it varies by region — the north of Thailand, the central plains and the southern islands do not share an identical climate calendar. It is also the kind of scheduling detail that individual schools, and eventually city-specific guides, are far better placed to describe accurately than a country-level overview, since local weather patterns and a school's own events calendar interact quite specifically.

Comparing two schools' calendars before accepting a place

If you are choosing between offers from two schools — which is common, since most families apply to several — put the two calendars side by side before you decide, not after. Look specifically at when each school's academic year starts and ends, how the terms or semesters are structured, where the main holiday breaks fall, and, if relevant to your child's stage, when internal assessment or exam periods sit within the year.

Also check practical questions that calendars sometimes answer only indirectly: whether the school observes a shortened day on the last day of a term, how much notice it gives of a change to a published date, and whether boarding schools' exeat and collection dates are published as part of the same document or separately. For boarding families in particular, the calendar of exeat weekends often matters as much as the term dates themselves, since it shapes how often a child returns home during term time. Our guide to choosing a school covers the wider comparison process this calendar check should sit alongside.

Questions to ask a school's admissions team about its calendar

A short list to ask admissions

A short, direct set of questions to admissions will usually get you everything you need. Ask for the current academic year's full calendar in writing, rather than relying on a summary from a website, since websites can lag behind the version actually in use. Ask whether the calendar is published a full year, or more than a year, in advance, and how far ahead you can rely on it not changing.

Ask specifically about any internal exam or assessment weeks that fall within term time, since these are not always shown on a general holiday calendar but matter enormously if you are considering a mid-term start. If boarding is relevant, ask for the exeat and collection schedule as a separate item. And if you are weighing more than one school, ask each one the same questions in the same words, so the answers are genuinely comparable rather than differently framed.

Frequently Asked Questions

When does the school year start in Thailand?

It depends which system you mean. Most international schools in Thailand start their academic year in August and run through to June. The Thai national school system conventionally runs from mid-May to March instead. These are two separate calendars, not one calendar described two ways, so always confirm the specific school's own start date rather than assuming either pattern applies.

Do all international schools in Thailand follow the same term dates?

No. While most share the broad August-to-June academic year, individual term and semester dates, half-term breaks and holiday periods are set by each school and vary — sometimes by a couple of weeks — even between schools in the same city. Always request the specific school's own calendar.

How is the Thai school calendar different from the international school calendar?

The Thai national and Thai-programme school year conventionally runs from mid-May to March, broken by a break around the turn of the calendar year, whereas most international schools run August to June. Families with children across both systems, or considering a bilingual school, should check both calendars separately, as they do not align.

Is it a problem to move to Thailand and start school mid-term?

Many families do it successfully, particularly with younger children, but it is generally harder on a child than a term start, since routines and friendship groups are already established. It carries the most risk for students in an examination year (IGCSE, A-level, IB Diploma or AP), where coursework and internal assessment may already be under way at the receiving school.

How far in advance are school calendars published?

This varies by school. Many publish the coming academic year's calendar well in advance, sometimes over a year ahead, but the exact timing and how firmly it is fixed differs. Ask the school directly and, if it matters for flights or other bookings, ask how often published dates change once issued.

Do international schools in Thailand close for Thai public holidays?

Most close for at least the major national public holidays, but exact practice varies by school, and some observances fall on dates set by the lunar calendar and move from year to year. Check the specific school's calendar rather than assuming a fixed date will recur.

Will my child's school holidays line up with holidays back home?

Not necessarily. A Thailand-based international school's holiday weeks, including the long summer break, often do not coincide with school holiday dates in the UK, US or elsewhere. It is worth mapping both calendars before booking flights for family visits, especially in the first year.

What happens to boarding-school term dates and exeat weekends?

Boarding schools publish exeat and end-of-term collection dates alongside, or sometimes separately from, general term dates. These matter as much as the term dates themselves for planning a child's time at home during the year, so ask for this schedule specifically when comparing boarding schools.

Can I compare a British-curriculum school's terms with an IB or American school's semesters?

Not directly by name, since the underlying structures differ — three terms with half-terms versus two semesters with a mid-semester break — and the calendars do not automatically align even within the same August-to-June year. Compare the actual dates from each school's published calendar rather than assuming equivalent terms fall at the same time.

Where can I find a specific school's exact term dates?

Directly from the school. Ask its admissions team for the current academic year's full written calendar rather than relying solely on a website summary, which can lag behind the version the school is actually using.

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