The year your child starts primary school depends on which system the school follows. In Vietnamese schools a child starts grade 1 in the September of the calendar year in which they turn six. British-curriculum schools usually group children born from 1 September to 31 August and start Year 1 at five turning six, after a Reception year, so Year 2 in a British school is the same age as Grade 1 elsewhere. American-curriculum schools usually have a Kindergarten year at five and Grade 1 at six, with a cut-off date that varies. Because the cut-off dates differ, a child born between September and December can join a different age group in a Vietnamese school than in a British or American one.
For families who will stay in one system, this hardly matters. For families who may move between Vietnam and another country, or between an international and a Vietnamese school, it matters a lot, because a child placed in a different year group on each move either repeats material or skips it. This guide shows how the main systems count, works through example birthdays, and explains what to ask when your child's age falls near a boundary.
How the main systems count
These are the usual rules. Individual schools, especially international schools abroad, sometimes set their own cut-off dates, so always confirm with the school.
| System | How children are grouped | Year before formal primary | First primary year |
|---|---|---|---|
| Vietnam (national programme) | By calendar year of birth, 1 January to 31 December | Final preschool year, the class for five-year-olds | Grade 1, in the year the child turns six |
| England and most British-curriculum schools | Born 1 September to 31 August | Reception, the last year of the Early Years Foundation Stage | Year 1, at five turning six |
| United States and most American schools | By a cut-off date, often around 1 September, set by state or school | Kindergarten, at five | Grade 1, at six |
| Australia | Cut-off dates set by each state or territory | Foundation year, called Prep, Kindergarten, Reception or Pre-primary depending on the state | Year 1 |
| Japan | Born 2 April to 1 April the following year | Final kindergarten year | First grade of elementary school, from April |
| South Korea | By calendar year of birth | Final kindergarten year | First grade of elementary school, from March |
| IB Primary Years Programme | A framework, not a set of grades; the school's own naming applies | Early years classes | Named by the host school's system |
Notice that the year names do not line up. Reception in England, Kindergarten in an American school and the five-year-old class in a Vietnamese preschool cover roughly the same age, but they differ in how much formal reading and writing they include. English Reception classes, for instance, teach systematic phonics, while Vietnam's preschool programme is designed to prepare children for reading without formally teaching it.
Worked examples for a September 2026 start
The table below applies the usual rules to four birth dates. These are illustrations of the counting method, not placement decisions; a school can and sometimes does decide differently.
| Child born in | Vietnamese school, 2026–27 | British-curriculum school, 2026–27 | American school with a 1 September cut-off, 2026–27 |
|---|---|---|---|
| February 2020 | Grade 1 | Year 2 | Grade 1 |
| July 2020 | Grade 1 | Year 2 | Grade 1 |
| October 2020 | Grade 1 | Year 1 | Kindergarten |
| December 2020 | Grade 1 | Year 1 | Kindergarten |
Read the British column with care. Year 1 in England is the same age as Kindergarten in an American school, so British year names always run one number higher. That is a naming difference, not a placement difference: the February child in Year 2 and the February child in Grade 1 are in classes of the same age.
The real difference is in the grouping. The British and American schools, both counting from September, split these four children into two year groups: the February and July children in one, the October and December children in the year below. A Vietnamese school, counting by calendar year, puts all four in the same grade 1 class. For an autumn-born child, that means Vietnamese grade 1 arrives a year earlier than the equivalent class in a British or American school.
This is why parents of children with birthdays between September and December should ask the cut-off question before anything else.
Why the first primary year is not the same everywhere
Even when the age matches, the experience of the first primary year differs. In England, Year 1 follows a Reception year in which most children have already learned letter sounds and begun to read simple words, and a statutory phonics screening check takes place at the end of Year 1. A child arriving from a preschool that did not teach phonics systematically can catch up, but the teacher needs to know.
In Vietnam, grade 1 is where reading and writing in Vietnamese are formally taught, starting with letters and sounds. Vietnamese is phonetically regular, with a Latin alphabet and tone marks, and many children read simple texts by the end of the first year. A foreign child who already reads a little English has an advantage with the alphabet but still needs to learn the tone marks and the sound values, which differ from English.
In American schools, Kindergarten has become more academic over the past decades in many places, with early reading and number work, and Grade 1 builds on it. A child who skipped Kindergarten because of a move may enter Grade 1 behind in reading routines, though usually not in ability.
For your child, the practical question is not the name of the year but what the class above and below is doing. Ask to see reading books and maths work from both, and judge where your child would be comfortable. Your child's preschool teacher, who has watched them all year, can often tell you which of the two would suit them better.
When your child is near a boundary
Ask whether the school ever places outside the age group. Many international schools place strictly by date of birth, because changing year group affects every future move. Others will consider exceptions for children with additional needs, prematurity or a very late birthday. Find out the policy before you argue a case.
Think about the next move, not only this one. If you place your child a year ahead or behind to fit one school, the next school in another country may correct it, which means a repeated or skipped year later. A placement that follows the rules of the system you are most likely to stay in is usually the safest.
Consider premature birth. Some families of children born early, close to a cut-off, ask for placement by due date rather than birth date. Policies vary; a letter from a paediatrician explaining the child's development is more persuasive than a request on its own.
Watch for the gap year problem. An autumn-born child who has finished grade 1 in a Vietnamese school and then moves to a British or American school will usually be placed by the September cut-off, which can mean joining a class at the level just completed. The reverse move, from a British or American school into a Vietnamese one, can skip grade 1 altogether, which is the year Vietnamese reading is taught. Ask the new school how it fills gaps in phonics, Vietnamese literacy or number work for children arriving between systems.
Moving into Vietnamese grade 1 from another system
Families who move from a British or American setting into a Vietnamese or bilingual school, or who switch from an international preschool to a Vietnamese primary, should look closely at grade 1 itself. This is the year in which Vietnamese reading and writing are taught from the beginning, and later grades assume it. A child who joins in grade 2 without it is not only behind in Vietnamese; they also meet Vietnamese-language maths and science texts they cannot yet read.
If your child is born late in the year and the Vietnamese rule would put them in grade 1 at five years and eight or nine months, that is normal in Vietnam, where every grade 1 class has children born in November and December. What matters more is whether your child already follows spoken Vietnamese in class. Children from bilingual preschools usually do; children from English-only preschools often do not, and may need a term or two of extra Vietnamese support.
Some families in this position choose a bilingual school for the first years, precisely because it teaches Vietnamese literacy while keeping English strong. Others start in a Vietnamese school with a tutor at home. Either way, plan the Vietnamese literacy year deliberately rather than letting the age rule decide it for you.
What to ask when you switch systems
When your child moves between systems, the conversation with the new school should cover three things. First, the year group, with the cut-off rule the school uses written down. Second, the content gap: which parts of reading, writing and maths the new class has already covered that your child has not, and the reverse. Third, the plan: who will help your child close any gap, and how the school will tell you whether it is working.
Bring evidence. Samples of your child's recent drawing and writing, a list of books they read or have read to them, and the last report from the previous school are more useful than a description. A short conversation between the old and new class teachers, by email or a brief call, is often the most useful single step, and most teachers are happy to do it if asked.
If you are moving out of Vietnam, check the destination's rules early. Some countries set school starting age by law and place children strictly by date of birth in public schools, regardless of what they did abroad. Others leave it to the school. The education ministry or local school authority of the destination usually publishes the rule.
A quick way to check your child's year group
Before you contact a school, you can work out the likely placement yourself.
- Find the school's cut-off date and the month its school year begins. For international schools this is usually on the admissions pages; if not, ask.
- Work out your child's age on the cut-off date in the year they would join.
- Match that age to the school's year names, using the school's own table if it has one.
- Do the same for the system you are most likely to move to next.
- If the two answers differ, raise it with both schools before you accept a place, not after.
This takes ten minutes and prevents the most common surprise: a child expected in Year 1 who is offered a place in Year 2, or a child expected in Grade 1 who is placed in Kindergarten. Neither is wrong in itself, but it is better to know in advance and plan for it.
Keep the answer, with the cut-off rule each school gave you, in the same folder as your child's reports. When the next move comes, the new school will ask which year your child completed and at what age, and a clear record of both makes the placement conversation short.
Câu hỏi thường gặp
Is my child too young for grade 1 in Vietnam if their birthday is in December?
No. Vietnam counts by calendar year, so a child born in December starts grade 1 in the September of the year they turn six, at five years and nine months. They are the youngest in the class, which is normal, and children born late in the year are a regular part of every Vietnamese grade 1 class.
Can a British school in Saigon put my child in Year 1 instead of Year 2?
Some will consider it, but many British-curriculum schools place children strictly by their 1 September to 31 August cohort, because that is what schools in England and other British schools abroad will expect. If you want a different placement, ask early and bring a clear reason, ideally supported by your child's current teacher.
Does the IB Primary Years Programme have its own year groups?
No. The PYP is a curriculum framework for children aged three to twelve, used inside schools that keep their own year names. An IB school following American conventions may call the years Kindergarten and Grade 1, while one following British conventions uses Reception and Year 1, so check each school's own cut-off.
What happens to the year group if we move to Japan or Korea?
Both start the school year in spring, Japan in April and South Korea in March, and both place children by date of birth. A child moving there from Vietnam in the middle of the year may join a class that is part way through its year. The local school or board of education confirms placement on arrival.
Will repeating a year harm my child?
Placing a young child in a younger year group because of a move is not the same as repeating after failing, and young children usually adapt quickly. The main costs are a mismatch in age with classmates and possible boredom. Ask the school how it stretches children who already know the material.
Should we choose the year group that suits our child's maturity or the official one?
Start from the official one for the system you expect to stay in, since every later school will use it. Maturity matters, but it changes fast between five and seven. If there is a strong reason to depart from the rule, discuss it with your child's preschool teachers and the new school together.