Saju in Korean Daily Life: Zodiac, Gunghap, Moving Days

Ask foreigners who have lived in Korea for a while and many will tell you some version of this story: someone they had just met asked their age, then their birth year, and finally, “What’s your zodiac animal?” It sounds nosy. In practice it is an old Korean way of placing a person, and behind it sits saju (四柱), the Four Pillars of Destiny.

Saju reads a person through eight characters: two each for the year, month, day and hour of birth. We already have a full guide on how saju differs from shamanic readings and tarot, and what a reading costs in Hongdae. This piece looks the other way, at how saju seeps into ordinary Korean life far from any fortune-teller’s table.

Why do Koreans ask "What's your zodiac animal?" when they first meet you?

Your zodiac animal is one of the eight characters in your saju: the one for your birth year, named after an animal. Because age and seniority change how Koreans speak to each other, the zodiac sign became a quick way to check someone’s age. Say “I’m a Dragon” and a Korean will place you within a 12-year cycle in a second.

The twelve animals run in order: Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Sheep, Monkey, Rooster, Dog, Pig. Paired with the five elements (wood, fire, earth, metal, water), they form a 60-year cycle known as the sexagenary cycle. That is why Koreans make a big deal of the 60th birthday, hwangap: it is the first time the year of your birth comes around again.

📅 When the year turns in 2027 (Korea time)

Do Koreans still check gunghap before getting married?

It is not required, but it is still common. What has changed is who does it. Families once treated it as a formal step; today parents often check quietly, and couples check for fun in an app.

In a traditional wedding, once a match was under discussion, the groom’s family sent the bride’s family a folded paper called sajudanja, listing his date and hour of birth. If the bride’s side agreed, the two charts were compared for gunghap (compatibility), and only then was a wedding date chosen. Picking an auspicious date is called taegil. The exact order and who did what varied by region and family.

Why do Koreans move house on son-eomneun-nal?

Son-eomneun-nal are the days of the lunar month that end in 9 or 0: the 9th, 10th, 19th, 20th, 29th and 30th. Son here has nothing to do with hands. It is a folk spirit believed to roam from direction to direction and get in the way of human plans. On these days it is said to be nowhere at all, which makes them good days for big moves: changing house, getting married, opening a shop.

Strictly speaking, son-eomneun-nal comes from the lunar calendar and folk date-picking rather than from saju’s birth-chart math. Koreans file it under the same instinct, though: choose a good day. As a result, son-eomneun-nal, especially when it lands on a weekend, is when moving companies get booked solid. You can see what moving day looks like in our guide to Korean moving day and the ladder trucks.

🗓️ Son-eomneun-nal, January–March 2027 (weekends in bold)

Do Koreans name babies according to saju?

Many families do. A jakmyeongso (naming office) looks at which of the five elements is missing from a baby’s chart and chooses Chinese characters believed to supply it. Some even count brush strokes. That is why two Koreans can share the same Hangul name written with completely different characters.

Changing your name as an adult is not unusual either. Stories of entertainers whose careers took off after a new stage name are a variety-show staple; we collected the documented ones in part 4, Korean celebrities and saju. For name fashions over the years, see Korean names by decade.

When do Koreans read their New Year fortune?

The weeks around Seollal are peak season for New Year fortunes. The classic is Tojeong Bigyeol, traditionally credited to the Joseon-era scholar Yi Ji-ham (pen name Tojeong). It uses only three pillars (year, month and day of birth) and reads the coming year month by month. The whole system has 144 readings, and most end on a hopeful note; it is said to have been written to comfort ordinary people in hard times (Seoul Metropolitan Government media hub).

Today the New Year fortune pages of Korean portals and apps get busy every December and January, and variety shows open the year by revealing their cast’s saju or face readings. Because the saju year turns at Ipchun, some fortune-tellers will tell you a January reading and a post–February 4 reading are two different things.

What about exams, job interviews and opening a business?

Koreans think of saju most when something big and uncertain is coming up. Parents check the fortunes of a child sitting a major exam, shop owners pick an opening date, office workers ask whether this is the year to change jobs. To see how the whole country moves on exam day, read our guide to Suneung, Korea’s college entrance exam day.

Do Koreans really believe in saju?

For most people it sits closer to “I use it as a reference” than “I believe it.” It is a way to settle the mind when anxious, a conversation starter, a seasonal family ritual. For younger Koreans it also works as a self-introduction language, much like asking a new acquaintance their MBTI (why Koreans love MBTI).

Plenty of Koreans also dismiss it as superstition, and there is real wariness of fortune-tellers who push expensive talismans or rituals. We cover shamanic ritual in our guide to Korean shamanism and everyday taboos in Korean superstitions explained.