Son-eomneun-nal · Free
The days the
spirit is away.
In Korea you do not pick a moving day at random. You pick a 손 없는 날 — a day when the 손, a wandering spirit, is not around to get in the way.
The story goes that the 손 spends eight days working its way round the eight compass points, two days at each, and then goes up to the sky for the ninth and tenth. On the lunar calendar that makes every date ending in 9 or 0 a clear day: the 9th, 10th, 19th, 20th, 29th and 30th.
Moving house, opening a shop, a wedding, signing something that matters. Removal firms in Korea book out on these days — and charge accordingly.
A Korean folk custom, not a reading of your birth chart — these days are the same for everybody. For a day chosen around your own chart, see the Saju reading.
How these dates are worked out
The rule is one line: the last digit of the lunar date
This page asks for no birth date and no name. It looks at dates, and the answer is the same for everybody. Two steps: each day of the month is converted to its lunar date, then the lunar day-of-month is read. If it ends in 9 or 0 — the lunar 9th, 10th, 19th, 20th, 29th and 30th — the day is clear. If it does not, it is not. That is the whole rule.
In the code that test is a single function whose body is one line: take the lunar day modulo ten and check for 9 or 0. No weekday, no season, and nothing about the person reading. So the same date always comes back the same way, and there is no hand-picked table of dates behind it.
The conversion to the lunar calendar uses the same calendar library the chart engine on this site uses. But only two values are taken from it — the lunar month and the lunar day. The day's stem-and-branch pillar, which that same library will happily hand over, is never read here, and the Japanese almanac's lucky and unlucky day marks — taian, butsumetsu — are not computed either. The small figures inside each cell are that lunar month and day.
What the son is, and what the calculation leaves out
The son (손) is a wandering spirit in Korean folk belief. The story is that it works its way round the eight compass points, two days at each — eight days in all — and then goes up to the sky for the ninth and tenth, when it is out of everybody's way. The lunar dates ending in 9 or 0 are those two days.
Moving house, opening a shop, a wedding, signing something that matters: those are the occasions the custom puts on the two days the spirit is away. The page is here, and free, because the answer is the same for everybody and there is nothing you have to hand over to see it — the server is sent a year and a month, and no screen on this page asks for a birth date. What the program does not do is model the story: nothing here tracks a compass point or works out where the spirit currently is. It checks a last digit.
So this is a folk custom turned into dates, not a divination. The site sorts its readings into three kinds, and this one carries the "Korean tradition" badge. A date conversion is computed, yes — but not from anybody's chart, which is the reason recorded beside that choice for keeping it out of the tier above.
Reading the calendar: four to seven a month, leap months included
Each cell carries the solar day in large figures and the lunar month and day in small ones. Cells that are clear days are tinted so they can be found by scanning, and under the grid there is a line listing that month's clear dates on their own.
How many there are shifts month to month. Lunar 9 and 10, 19 and 20, 29 and 30 are consecutive days, so they appear as consecutive solar dates too. But a lunar month runs either 29 or 30 days, and a month that ends on the 29th has no 30th at all. October 2026 is one of those: 9, 18, 19, 28 and 29 — five days. August 2026 has seven: 1, 2, 11, 12, 21, 22 and 31. Count all 2,412 months of the supported range, 1900 to 2100, and six is the commonest at 1,296 months, five next at 888, then seven at 207 and four at 21 — never fewer than four, never more than seven.
A pair can also straddle the month end. 31 August 2026 is lunar 7.19 and its partner, lunar 7.20, is 1 September. If the pair you wanted is cut off at the end of the month, step across with the arrows. Leap months change nothing: the small figures are prefixed with yun (윤), the Korean word for a leap month, and that mark stays in Korean letters whichever language the page is in. The last digit is then tested exactly as it is in any other month.
What this page does not know
The month you land on comes from your own device's clock, read in local time rather than UTC — so opening the page on the morning of the 1st in Japan still shows that month, not the previous one. The arrows move one month at a time and roll over into the next or previous year at December and January. The range is 1900 to 2100; asked for anything outside it, the calendar is not built and the page says so in one line instead.
Each time you change month, the body of the request to our server is a year and a month, two numbers. No birth date, no name: this page never receives them. The request does go to our own site, so your browser attaches the cookies this site has already set — your language choice, and your licence key if you have a subscription — exactly as it would on any other page here. The conversion runs on the server only so that the calendar library behind it need not be shipped to the device of somebody who came to look at a calendar. No language model is involved anywhere on this page.
And the part that matters: these dates were not chosen for you. Choosing a day against your own chart is a different question and lives elsewhere on the site. Nothing about the reader enters this calculation, so the same month opened by anyone, on any device, at any time, comes back with the same dates on it. This is not a tool for dragging a fixed commitment onto a particular square — it is somewhere to lean when any day would do.
Separately from this calendar: read the rules a chart is built by →
Quick questions
What is a son-eomneun nal (손없는 날), Korea's moving day?
Folk custom says a wandering spirit called the son circles the eight directions two days at a time, and on the lunar 9th and 10th days it rises to the sky — leaving two days when it blocks no one. Koreans traditionally pick those days for moving house, opening shops and weddings.
Which dates count as son-eomneun nal?
Any date whose lunar day ends in 9 or 0 — the lunar 9th, 10th, 19th, 20th, 29th and 30th. The rule is one line: convert the date to the lunar calendar and look at the last digit. Your birth date plays no part, so the answer is the same for everyone.
How many are there in a month?
Usually five or six, and always between four and seven. The pairs sit on consecutive days, but a lunar month has 29 or 30 days — when it ends on the 29th, that month simply has no 30th.
Is this the same as Japan's taian (大安)?
No. 大安 and 仏滅 belong to the Japanese six-day rokuyō cycle; son-eomneun nal is a Korean custom read from the lunar date's last digit. This page shows only the Korean reading — it does not print rokuyō marks.