Dates Are All Sino: 2024년 3월 5일

Dates are the friendliest corner of the Korean number system, because there is only one rule to remember: everything is Sino. The year (년), the month (월), and the day (일) all take Sino-Korean numbers, and they run in big-to-small order — year, then month, then day. So 2024년 3월 5일 is read 이천이십사 년 삼 월 오 일. There is no native-number temptation anywhere in a date, which makes the whole system clean — except for two months that quietly break their own spelling, and those two you simply have to memorize.

The order and the three counters

A Korean date is built outermost-first: the biggest unit (the year) comes first and the smallest (the day) comes last. This is the reverse of the American month/day/year habit, and it lines up instead with the international year-month-day convention.

The two irregular months: 유월 and 시월

Here is the one thing that actually needs memorizing. Ten of the twelve months are perfectly regular — just the Sino number plus 월. But June and October drop a final consonant for euphony, because the full form sounds clumsy:

• 6월 = 유월, not ×육월 (the ㄱ of 육 is dropped)
• 10월 = 시월, not ×십월 (the ㅂ of 십 is dropped)

Every other month keeps its number intact. Here is the full set, with the two irregulars flagged:

The year, and 일 as a duration

The year is read as an ordinary large Sino number plus 년: 2024 is 이천이십사, so 2024년 is 이천이십사 년.

The same counter 일 that names a calendar day also serves as the counter for a span of days — and it stays Sino there too. 삼 일 can mean "the 3rd" (a calendar date) or "three days" (a duration), disambiguated by context and by words like 동안 ("for the duration of").

Asking the date: 며칠이에요?

To ask what today's date is, use 며칠 ("what day of the month") — a fused question word, not 몇 일. This spelling catches learners out; it has its own page, 며칠 vs 몇 일.

Why English speakers slip here

Two habits transfer badly. First, the order: an American writes and says "March 5th, 2024" (month-day-year), while Korean insists on year-month-day, biggest first. Second — and more insidious — English speakers who have already learned that Korean counts objects with native numbers try to apply that instinct to the day of the month, producing ×세 일 for "the 3rd." But a date is not a count of tangible things; it is a measured position on the calendar, squarely in Sino territory. "The 3rd" is 삼 일, and "three apples" is 사과 세 개 — the same English "three," two different Korean systems, decided entirely by what is being counted. (See the Sino-Korean overview for that split.)

Common Mistakes

1. Using native numbers for a date. Days, months, and years are all Sino. There is no ×세 일 for the 3rd.

• ✗ 세 일, 다섯 일
• ✓ 삼 일, 오 일 — sam il, o il — "the 3rd, the 5th"

2. Saying ×육월 for June. The standard form drops the ㄱ.

• ✗ 육월 십오 일
• ✓ 유월 십오 일 — yuwol sibo il — "June 15th"

3. Saying ×십월 for October. The standard form drops the ㅂ.

• ✗ 십월 삼 일
• ✓ 시월 삼 일 — siwol sam il — "October 3rd"

4. Over-applying the irregulars to 11월 and 12월. Only the standalone 6 and 10 reduce; 십일월 and 십이월 keep their full 십.

• ✗ 시일월 / 시이월
• ✓ 십일월, 십이월 — sibirwol, sibiwol — "November, December"

5. Reversing the date order to English month-first. Korean runs biggest unit to smallest: year, month, day.

• ✗ 삼월 오 일 이천이십사 년
• ✓ 이천이십사 년 삼월 오 일 — icheonisipsa nyeon samwol o il — "March 5th, 2024"

Key Takeaways

• Year (년), month (월), and day (일) are all Sino, ordered big-to-small: 이천이십사 년 삼월 오 일.
• Two months are euphonic irregulars: 6월 = 유월 (not ×육월) and 10월 = 시월 (not ×십월). The other ten are regular, and 십일월 / 십이월 keep their full 십.
• "The 5th" is 오 일, never a native form — a date is measured, not counted-on-fingers, so it's pure Sino.
• The counter 일 also measures durations (삼 일 동안 = "for three days"), still Sino.
• Ask the date with 며칠이에요?