Your Korean zodiac animal might not be the one you think: K-SaJu's February rule

Say you were born on January 28, 2020. Lunar New Year had arrived three days earlier, on January 25, and every zodiac chart online calls 2020 the Year of the Rat. So you're a Rat, right? In K-SaJu (Korean astrology), you're not. You're a Pig, because in a saju chart the year hadn't turned yet. Here's how that works, who it affects, and how to check your own animal.

The year turns at the start of spring

K-SaJu doesn't start the year on January 1, and it doesn't use Lunar New Year either. It uses a solar marker called the start of spring, written 立春 (start of spring). It's the first of the twelve solar markers that open each K-SaJu month, and it lands around February 4.

"Around" is doing some work there. In 2025 the start of spring arrived at 11:10 p.m. on February 3, Korea time. In 2026 it came at 5:02 a.m. on February 4. The date wobbles by a day because the marker follows the sun, and our calendar doesn't line up with the sun perfectly.

Lunar New Year moves around much more. It can fall anywhere from late January to mid-February, so it sometimes comes before the start of spring and sometimes after:

• 2002: Lunar New Year on February 12, start of spring on February 4.
• 2020: Lunar New Year on January 25, start of spring on February 4.
• 2026: Lunar New Year on February 17, start of spring on February 4.

Plenty of zodiac charts online switch animals at Lunar New Year. A K-SaJu chart switches at the start of spring, and that's the rule Rocky Saju follows.

Who ends up with a different animal

If you were born between January 1 and the start of spring, your K-SaJu year animal belongs to the year before. Here are a few real examples, all calculated for births in Korea:

• January 20, 2000: the calendar says Year of the Dragon, but the chart's year is still 己卯 (Garden Rabbit). Rabbit it is.
• January 28, 2020: Lunar New Year had already passed, yet the year is 己亥 (Garden Pig). This person is a Pig.
• February 8, 2002: this one goes the other way. Lunar New Year was still four days off, but the start of spring had passed, so the year is 壬午 (Ocean Horse).
• February 10, 2026: a baby born on this day is already a Horse in K-SaJu, a full week before Lunar New Year.

Born on February 6 or later? Then you can relax. Your animal matches the one you grew up with, as long as that one was based on your birth year.

Born near the marker? Your birth time matters

The start of spring is a single moment, not a whole day. Take February 4, 2000. The marker didn't arrive until 9:40 p.m. Korea time, so a baby born in Seoul at noon that day is a Rabbit. A baby born at 11 p.m. the same night is a Dragon. In 2020 the line fell at 6:03 p.m., which made a noon baby a Pig and a 7 p.m. baby a Rat.

Since the marker is one moment for the whole planet, the clock time changes with where you were born. The 2026 marker hit at 5:02 a.m. in Seoul. In New York that was 3:02 p.m. on February 3, and in Los Angeles it was 12:02 p.m. So a New York baby born at 2:30 that afternoon is a Snake, and one born at 4 p.m. is a Horse. If you were born outside Korea, our guide to birth time for people born abroad explains how time zones and daylight saving fit in.

When a birth falls within two hours of a marker, Rocky Saju adds a note saying a few minutes could change the pillar, and it shows the exact marker time for that day. If you were born on a marker day and don't know your time, that's a good moment to ask a parent or dig out a birth record.

The twelve animals show up four times

Your year animal is only one of four animals in your chart. Each pillar has its own:

• Year animal: set by the year, switching at the start of spring.
• Month animal: set by the solar month. The Tiger month starts with the start of spring. After that come the Rabbit (around March 5 or 6), Dragon (around April 5), Snake (around May 5 or 6), Horse (around June 5 or 6), Goat (around July 7), Monkey (around August 7 or 8), Rooster (around September 7 or 8), Dog (around October 8), Pig (around November 7), Rat (around December 7) and Ox (around January 5 or 6).
• Day animal: set by the day itself, and it comes around again every 12 days.
• Hour animal: set by your two-hour birth window. For births in Korea we use the common Korean 30-minute shift, so the Rat hour runs from 11:30 p.m. to 1:30 a.m. and the Ox hour from 1:30 to 3:30 a.m. The rest follow in order around the clock, ending with the Pig hour from 9:30 to 11:30 p.m.

So one person can be a Dragon by year, a Tiger by month, a Goat by day and a Rooster by hour, all at the same time. Notice that the month animals also run on solar markers. A January 3 baby and a January 8 baby can have different month animals, even though both keep the previous year's animal.

Your year animal vs your birthday type

You share your year animal with everyone born in the same stretch of twelve months. That makes it great for small talk, but it can't say much about you personally. K-SaJu readers put far more weight on the day pillar. Its top half is your nature, and its animal is your love seat, the spot where a partner sits in your chart. Together they make your birthday type, one of 60, like 癸卯 (Rain Rabbit) or 庚戌 (Steel Dog).

You can see this in how our match score is built. The two year animals count for 10 points out of 100, and we label that part "for reference". The two day animals, the love seats, count for 25. So if someone tells you your zodiac animals clash, don't sweat it. That's the smallest slice of the score.

If you're curious about the full set, our guide to the 60 birthday types explains how they're built, and you can look yours up in the birthday types guide.

How to check your own animals

1. Find your birth date, and your birth time and city if you can.
2. Check the calendar. If your birthday falls between January 1 and early February, see when the start of spring arrived that year. A free reading does this for you.
3. Look at all four animals, not just the year.
4. Then find your birthday type, the pair that says the most about you.

The free life reading lays out all four pillars with their animals, and it flags a birth near a solar marker. New to all this? Start with our 5-minute guide to K-SaJu.