How to Find Your Korean Day Sign (Day Master)
In a nutshell
- There is no mental shortcut: day signs follow a 1,000-year calendar count, so you need a conversion tool.
- Your birth date alone is enough. Time and birthplace are optional and only sharpen the result.
- Watch two edge cases: births near midnight, and births in countries that used daylight saving time.
Short version: your day sign, the piece of your saju chart that is most personally yours, cannot be worked out with a quick mental trick. It takes a calendar conversion, which is why people search for a day master calculator in the first place.
This guide explains what the conversion involves, what you will get back, and the edge cases worth knowing about before you trust any result.
Why there is no simple formula
The 60 day signs cycle through the calendar in strict order, one per day, and the count has been running unbroken for well over a thousand years. Finding your sign means locating your exact birth date inside that ancient count.
Doing it by hand requires the traditional almanac tables Korean readers call manseryeok: thick reference books that map modern dates onto the old calendar, accounting for historical calendar reforms along the way.
Before software, looking up your day pillar was itself a service you paid a reader for. The math is not deep, but the bookkeeping is unforgiving: one day off and you are reading a stranger’s chart.
What you get back
The conversion returns a two-part code. The stem gives your element and polarity, which IEUM shows as a color: Green (Wood), Red (Fire), Gold (Earth), Silver (Metal), or Blue (Water). The branch gives your animal, Rat through Pig.
Together: Green Rat, Silver Monkey, Blue Pig. In BaZi terms the same result would be written Yang Wood Rat, Yin Metal Monkey, Yin Water Pig. Same chart, different label style. The full set, with Korean names and BaZi equivalents, is in the 60 day signs guide.
The fast way: three steps
- Enter your birth date. IEUM runs the manseryeok conversion instantly. No sign-up, and a nickname is fine.
- Add birth time and place if you know them. Both are optional. The date alone determines your day sign in almost every case; time and birthplace make the calculation exact.
- Read your sign, then compare. You get your color-and-animal sign with a written character sketch, and if you invite friends, every pair in the group gets a compatibility reading too.
Edge cases worth knowing
Born near midnight? The day boundary is where birth time earns its keep. If you arrived at 11:58 pm or 0:07 am, entering the time removes any doubt about which day, and therefore which sign, is yours.
Born outside Korea? Your chart follows your local birth time, not Korean time. IEUM asks for your birthplace and handles the time zone math, including one detail many calculators skip: if daylight saving time was in effect when you were born, the clock is adjusted back to standard time before the pillars are set, the way traditional practice expects.
No birth time at all? Perfectly fine. Your day sign and all compatibility scores work from the date alone. The details are in does birth time matter in saju?