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The Saju new year
isn't January 1
The Saju year begins at Ipchun (around February 4). That's why people born in January or early February may have the previous year's zodiac animal. Months work the same way: they're divided by solar terms, not by the calendar.
In this article 6 topics
Born in January, but a different zodiac animal?
In Saju, the year turns at Ipchun (立春, Start of Spring). Not January 1, and not Seollal either. Ipchun usually falls around February 4, and its date and time shift a little every year.
That's why things like this happen.
Someone born on January 20, 2026 is in the Eulsa year (Snake) in Saju terms. 2026 is the Byeong-o year (Horse), but Ipchun hasn't passed yet.
On the other hand, someone born on February 10, 2026 is past Ipchun, so they're in the Byeong-o year (Horse).
In other words, for people born between January 1 and Ipchun, the year on their resident registration and their Saju year are different. That period is about one-tenth of the year, so it applies to more people than you might think.
Why Ipchun, of all days?
Saju is a system that deals with the flow of the seasons. Its reference point isn't a calendar people made up, but the position of the sun.
Ipchun is the first of the 24 solar terms, the point where winter turns to spring. The weather still feels cold, but it's seen as the moment the energy changes direction. That's why Saju cuts the year here.
January 1 has nothing to do with the sun's position, and lunar Seollal moves by nearly a month from year to year. Neither suits a system that deals with the seasons.
Months are divided by solar terms too
The same principle applies to months. A Saju month begins at a solar term, not on the 1st of the calendar month.
| Saju month | Starting solar term | Approximate timing |
|---|---|---|
| Tiger month — Inwol (month 1) | Ipchun | Around February 4 |
| Rabbit month — Myowol (month 2) | Gyeongchip (驚蟄, Awakening of Insects) | Around March 5 |
| Dragon month — Jinwol (month 3) | Cheongmyeong (清明, Clear and Bright) | Around April 5 |
| Snake month — Sawol (month 4) | Ipha (立夏, Start of Summer) | Around May 5 |
| Horse month — Owol (month 5) | Mangjong (芒種, Grain in Ear) | Around June 6 |
| Sheep month — Miwol (month 6) | Soseo (小暑, Minor Heat) | Around July 7 |
| Monkey month — Sinwol (month 7) | Ipchu (立秋, Start of Autumn) | Around August 7 |
| Rooster month — Yuwol (month 8) | Baengno (白露, White Dew) | Around September 8 |
| Dog month — Sulwol (month 9) | Hallo (寒露, Cold Dew) | Around October 8 |
| Pig month — Haewol (month 10) | Ipdong (立冬, Start of Winter) | Around November 7 |
| Rat month — Jawol (month 11) | Daeseol (大雪, Major Snow) | Around December 7 |
| Ox month — Chukwol (month 12) | Sohan (小寒, Minor Cold) | Around January 5 |
The dates change every year, and you have to account for the exact time. If a solar term begins at 3 p.m., someone born that morning is still in the previous month. This is where Saju calculations most often go wrong.
Why the month pillar matters
The month pillar is the pillar that holds which season you were born in. It carries a great deal of weight in Saju interpretation.
Even with the same Day Master, a different season means different needs. A Gap Wood (tree) born in winter badly needs warmth, while a Gap Wood born in spring needs room to stretch out instead. Change one character of the month pillar and the whole direction of the reading changes.
So if your birthday falls on a solar-term boundary, the very first step is to confirm your Eight Characters accurately.
When should you start reading your New Year fortune?
Strictly speaking, from Ipchun. A New Year fortune read in January is, in Saju terms, still the previous year.
In practice, though, people read their New Year fortune from December through February, because that's when they make plans for the new year. There's no need to call that wrong — just read it knowing that "in Saju, the year begins at Ipchun".
Practically, it helps to think of it like this.
- January — a preparation period. Time to wrap up the past year's rhythm and make plans for the new year.
- After Ipchun — the new rhythm begins. It's considered better to schedule new undertakings from this point on.
Mutal Unnie calculates by solar terms, so your birth chart and yearly rhythm split precisely at Ipchun. If being born in January has left you unsure of your zodiac animal, check the Eight Characters of your birth chart in the app.
Check your Saju zodiac animal
If you were born in January or February, it may differ from what you thought.
Get the app for iPhone & AndroidFAQ
When does the new year start in Saju?
At Ipchun. Not January 1, and not Seollal (Korean Lunar New Year), but Ipchun, the first of the 24 solar terms, usually around February 4. That's because Saju is a system that follows the position of the sun.
If I was born in January, is my zodiac animal from the previous year?
Yes. Births before Ipchun use the previous year's stem-branch pair. Someone born in January 2026 belongs to the Eulsa (乙巳) year (Snake), not the Byeong-o (丙午) year (Horse). The zodiac animal used in everyday life is often based on the Gregorian year, so the two can differ.
What are solar terms?
They're divisions that split the year into twenty-four according to the sun's position. In Saju, the month changes at these solar terms. The reference point isn't the 1st of the calendar month but the moment the solar term begins.
Can I read my New Year fortune in January?
Yes. Strictly speaking, after Ipchun is correct, but people usually read it from December to February because that lines up with when they make plans. That said, it's considered better to set the start date for any big new undertaking after Ipchun.