Utileno
EN한국어
DATE

Date & Time calculators

Questions that a date answers: how old someone is, how many days sit between two dates, what weekday it is N days from today, how many business days a month has, when the next holiday falls. You enter one or two dates and get the result immediately.

The Korean-specific calculations live here too — counting age next to international age, lunar birthdays converted to the solar calendar, and weekly holiday pay and annual leave worked out under the Labor Standards Act. Each legal calculator states its assumptions and limits under the result.

14 tools

Start here

Age CalculatorEnter a date of birth and get the exact age in years, months and days — plus a birthday countdown.

ExampleExact age today — Born 1990-05-15? As of 2026-08-16 that is 36 years, 3 months and 1 day — 13,242 days in total.

Date CalculatorCount the exact number of days between two dates — instantly, right in your browser.

ExampleDays until a deadline — From 2026-08-16 to 2026-12-31 is 137 days — that is 19 weeks and 4 days.

Age in a Given YearBirth year and a year in question are enough — all three Korean ages, with the one in use back then marked.

ExampleBorn 1980 — how old in 2015? — Counting age 36, year age 35, international age 34 before the birthday and 35 after. 2015 is before the 2023 unification, so the age people would have said was 36. With a birthday of 10 May, 9 May 2015 gives 34 and 10 May gives 35.

Age

Age CalculatorEnter a date of birth and get the exact age in years, months and days — plus a birthday countdown.Age in a Given YearBirth year and a year in question are enough — all three Korean ages, with the one in use back then marked.Lunar Birthday CalculatorSee what solar date a lunar birthday falls on each year, then take the whole list into your calendar.

Between dates, days from now

Date CalculatorCount the exact number of days between two dates — instantly, right in your browser.Days From TodayType a number of days and instantly see the exact date and weekday it lands on.D-Day CountdownAdd the dates you are counting to. Days are counted on the Seoul calendar.Business Days CalculatorWorking days between two dates, or the date N business days out — weekends and Korean public holidays taken out for you.Time Zone Meeting PlannerPick the cities, set each working day, and see the hours that actually overlap.

Calendars and holidays

Korean HolidaysEvery South Korean public holiday for the year — lunar holidays and substitute days included.Korean Lunar ConverterConvert Korean lunar dates to solar and back — leap months, the sexagenary year, and the zodiac included.Korean Zodiac CalculatorThe animal year a birthday belongs to, counted from Seollal.

Work and pay

Work Hours CalculatorWork out how many hours you worked between two times, minus breaks — or total a whole week with overtime. Overnight shifts included.Weekly Holiday Pay CalculatorHourly wage and weekly hours in — the paid rest day, the week’s total and what each hour is really worth out.Korean Annual Leave CalculatorFrom a hire date: leave earned, leave still usable, the next grant and the day each one lapses.

Recently added

Related categories