The seven days of the week in Korean all end in 요일 (yoil), meaning "day of the week," attached to an element. 월요일 (wolyoil) is Monday, the moon's day. The elements run moon, fire, water, wood, gold, earth, and sun — the same seven celestial bodies that named the days in English.
Once you spot the pattern, you only have to memorize seven short syllables. The 요일 (yoil) ending never changes, and each day's first syllable is a single element you can picture.
The seven days
Each day pairs an element with 요일 (yoil). Read them top to bottom and the week falls into place.
| Day | Korean | Romanization | Element / Planet |
|---|---|---|---|
| Monday | 월요일 | wolyoil | Moon (월) |
| Tuesday | 화요일 | hwayoil | Fire / Mars (화) |
| Wednesday | 수요일 | suyoil | Water / Mercury (수) |
| Thursday | 목요일 | mokyoil | Wood / Jupiter (목) |
| Friday | 금요일 | geumyoil | Gold / Venus (금) |
| Saturday | 토요일 | toyoil | Earth / Saturn (토) |
| Sunday | 일요일 | ilyoil | Sun (일) |
To ask what day it is, say museun yoirieyo? (무슨 요일이에요?) — "what day is it?" A quick memory hook: the work week climbs through the elements — moon, fire, water, wood, gold — before earth and sun bring the weekend.
Why elements name the days
This seven-day, seven-element week reached Korea through classical Chinese astronomy, which mapped the days onto the sun, the moon, and the five planets visible to the naked eye. Fire is Mars, water is Mercury, wood is Jupiter, gold is Venus, earth is Saturn.
The West built the very same week, independently. Monday is the moon's day, Sunday the sun's, and Saturday belongs to Saturn — while the Romance languages kept Mars, Mercury, Jupiter, and Venus in their weekday names. Two ends of the world looked up at the same sky and landed on the same seven days.
Today, tomorrow, and the weekend
A few time words do the heavy lifting in everyday conversation, and none of them use the 요일 ending.
오늘
oneul
today
내일
naeil
tomorrow
어제
eoje
yesterday
The weekend is jumal (주말), and Koreans look forward to it as much as anyone. The five working days, Monday through Friday, are the pyeongil (평일) — together with the 주말, they split the Korean week just like ours.
Friday has a nickname: bul-geum (불금), a mash-up of 불 (bul, "fire") and the 금 (geum) from 금요일. It means "burning Friday" — the Korean version of "TGIF," all the energy of a Friday night out after a long work week.
Putting it together
String a day and a time word together and you can make plans:
토요일에 만나요
toyoire mannayo
Let's meet on Saturday
내일 봐요
naeil bwayo
See you tomorrow
Both stay in the polite -yo form, so they are safe with anyone — a coworker, a new friend, or a shopkeeper.
Keep learning Korean
Seven elements, one ending, and a handful of time words cover most of what you need to make plans in Korean. Practice saying them out loud with audio and spaced repetition in the Pretalk app, and build out the rest of your daily vocabulary with our free essential Korean phrases.
