u/Ksaju_Kim

If you've ever tried to book movers in Korea, you might have been told a date is full, or costs more, because it's a "son eomneun nal". It means a day without son, and son here is a spirit (short for sonnim, guest) that moves around the four directions on a ten day loop and gets in the way of anything you start in its direction.

The rule runs on the lunar calendar and it's simple enough that most Korean adults can do it in their head. On lunar days ending in 1 or 2 it sits in the east. 3 and 4 put it in the south, 5 and 6 in the west, 7 and 8 in the north. On days ending in 9 or 0 it has gone up to the sky, so there's no direction to avoid at all, and those six days a month are the ones people mean.

Strictly speaking you only have to dodge the direction you're moving in. Moving west on a day ending in 1 is technically fine. Almost nobody bothers with that part anymore, people just go for the 9 and 0 days, which is why a weekend that also lands on one gets booked out early. Moving firms and wedding halls price those days higher, so a belief a lot of people say they don't hold still shows up on the invoice.

There's a second explanation for the name that I find more interesting. The National Folk Museum's folk encyclopedia mentions that some trace it to 巽, the wind trigram, which carries the sense of going in and out. I'm not sure that one holds up historically, the ghost version is what grandparents tell you, but it's a neat overlap given the whole thing is about entering a new place.

Date picking here kind of works in layers, and this shows it pretty well. Son eomneun nal is the folk layer anyone can check with a lunar calendar. The more formal version, taegil, has someone look at the saju of the people involved and pick a day that fits them, and plenty of families still do that for weddings while also checking for son.

Anyone have something like this where they live? A day you'd avoid moving on even if you don't really buy it?

Samjae (삼재) is one of the most common bits of zodiac lore in Korea, and I rarely see it come up in English. It's a three year stretch of bad weather tied to your year animal, and 2026 is the middle of it for anyone born in a Pig, Rabbit or Goat year.

The mechanics come straight from the trines BaZi uses. Pig, Rabbit and Goat form one harmony group. Their samjae opens in the Snake year, because Snake clashes Pig, the head of the group, and then it runs on through the Horse and the Goat. For them that means 2025 to 2027. Tiger, Horse and Dog get their turn from the Monkey year in 2028.

Each of the years has a name. Deul samjae is when it arrives, nul samjae is when it presses down on you, and nal samjae is when it leaves. If you go by the solar calendar the switch happens at ipchun, around 4 February, but plenty of families just count from Lunar New Year.

People don't really panic over it. Some buy a samjae talisman, usually a hawk with three heads and one leg, or go to a temple to pray at the start of the year. More often it just nudges timing. A move gets pushed back, or someone thinks twice about the wedding date.

I read saju, and honestly samjae isn't something I put much weight on. It looks at one branch out of eight. Whether 2026 is rough for you depends far more on how the Horse year lands on the rest of your chart, the day branch most of all, and someone whose chart is short on Fire can do fine right in the middle of their samjae.

Has anyone here actually been told they were in samjae? I'd love to know if the family did anything about it.

This one comes up more than you'd think, and a lot of English calculators just pick an answer for you without saying so.

The Rat hour (子) runs from 11pm to 1am. Nobody really argues about that part. The argument is about what happens to the day pillar inside it. The older view says the new day starts when the Rat hour starts, so a baby born at 11:40pm already belongs to the next day, day pillar and hour pillar both. The other view says the calendar day still turns at midnight. Someone born at 11:40pm keeps the day pillar of the date on their birth certificate, and only the hour pillar gets worked out as if the next day had begun. Chinese sources argue this under the names 早子時 and 夜子時, so it isn't a Korean invention, but in Korea people call the second one yajasi and a lot of the manseryeok apps there let you switch between the two in settings.

Korea adds its own wrinkle. Korean clocks run on the 135°E meridian while Seoul sits a little under 127°E, so the sun is roughly half an hour behind the clock. That's why Korean tables show the Rat hour as about 11:30pm to 1:30am. Someone born at 11:15pm in Seoul isn't in the Rat hour at all once you correct for that. They're still Pig, and the whole midnight question never comes up for them.

For the people it does touch, it's not a small thing. The day pillar is the one that stands for you, and its branch is the spouse palace. Switch schools and you can walk away with a different day master entirely, which means every Ten Gods label in the chart gets rewritten along with it.

I don't think there's a knockdown argument for either side, and I know careful readers who hold each one. What I'd push back on is a calculator that picks silently. If you were born late in the evening, it's worth running your chart both ways and seeing whether the day master changes, then reading the two descriptions side by side.

Has anyone here actually done that? I'm curious which version people end up recognizing themselves in, and whether it's the one their calculator gave them.

Most compatibility discussions online work from one piece of data. In Western astrology it is your sun sign, in Chinese astrology it is your birth year animal. Both capture something real, but both sit on the surface.

Korean saju practitioners split compatibility into two distinct layers with different names.

겉궁합 (geot-gunghap): surface compatibility

This compares your year pillars, which is almost the same as comparing your zodiac animals. Fire Horse with Earth Dog? That is a 寅午戌 three-harmony frame, a structural bond at the year level. Metal Rat with Wood Horse? That is a 子午 direct clash.

This layer tells you how your families, backgrounds and social personas interact. Korean matchmakers historically checked 겉궁합 first because marriage involved two families, not just two people.

But the match could pass 겉궁합 and still fail. That is where the second layer enters.

속궁합 (sok-gunghap): deep compatibility

This compares the earthly branch of your day pillar. In Korean saju, this branch is called the 배우자궁 (baeujagunng, spouse palace). It is the structural seat of your closest intimate relationship.

The day pillar changes every day. Two people born in the same year, same month, even the same week can have completely different day pillars. That is why year-based compatibility catches the broad strokes but misses the grain.

속궁합 reads six types of interaction between your day branch and your partner's:

• 합 (hap, harmony): the branches bond. 子丑, 寅亥, 卯戌, 辰酉, 巳申, 午未. The strongest structural pull.
• 충 (chung, clash): the branches collide. 子午, 丑未, 寅申, 卯酉, 辰戌, 巳亥. Friction is constant, but it also means strong mutual awareness.
• 형 (hyeong, punishment): a directional penalty. 寅巳申 (three punishments), 丑戌未 (bullying punishment), 子卯 (uncivilized punishment). These create recurring conflict that feels structural rather than situational.
• 해 (hae, harm): quieter undermining. 子未, 丑午, 寅巳, 卯辰, 申亥, 酉戌. Less dramatic than clash but harder to pinpoint.
• 원진 (wonjin, deep resentment): unique to Korean saju, not used in standard Chinese BaZi. The two branches cannot see each other clearly, causing chronic misunderstanding without obvious conflict.

Why the distinction matters

A couple whose 겉궁합 clashes (year branches in opposition) might have a beautiful 속궁합 (day branches in harmony). The families may disapprove, but the two people feel drawn to each other in a way they cannot explain. Korean dramas use this setup constantly: parents opposing a match that the couple cannot release.

The reverse is more dangerous. Strong 겉궁합 makes everyone say "they look great together." Weak 속궁합 means the two people privately feel disconnected, often without understanding why.

How this sits next to BaZi and Western synastry

Chinese BaZi practitioners compare day masters and use the five-element relationship between them. That overlaps with 속궁합, but the Korean system formalizes the two-layer split and adds 원진, which standard BaZi does not use.

Western synastry compares every planet between two charts. More data points, but no single "seat" for the partnership. Korean saju concentrates the question into one branch position: day earthly branch. This trades breadth for precision.

None of these systems claim the final answer. They read different layers of the same question. If you already work with BaZi or Western synastry, 겉궁합 and 속궁합 give you a frame you can lay over what you already know.