Korean Calendar Tools
Free Korean calendar tools for the 24 solar terms, yearly public holidays and substitute holidays, lunar-to-solar date conversion, and a perpetual calendar.
Calendar Tools is a free set of Korean calendar utilities that run right in your browser with no sign-up or install, instantly calculating the 24 solar terms, public holidays, lunar-solar conversions, and a perpetual calendar.
Lunar dates and holidays use a 2024-2035 lookup table based on Korea Astronomy and Space Science Institute (KASI) lunisolar data, and every calculation runs in your browser.
Calendar Tools
24 Solar Terms Calculator
Enter a year to see the solar (Gregorian) dates and times of all 24 solar terms, such as Ipchun, the spring and autumn equinoxes, the summer solstice, and the winter solstice.
Korea Public Holidays Calculator
See each year's statutory public holidays and substitute holidays at a glance, with dates and days of the week.
Lunar Date Converter
Convert dates between the solar (Gregorian) and Korean lunar calendars. Useful for birthdays, memorial days, and ancestral rites.
Perpetual Calendar
Pick a year and month to open a calendar with public holidays highlighted.
Calendar Guides
Why Use Calendar Tools
- Free, no install — Use it right in your browser with no sign-up or app download.
- No personal data collected — Every calculation runs in your browser and your inputs are never sent to a server.
- Based on official data — Lunar dates and holidays use a lookup table (2024-2035) built from Korea Astronomy and Space Science Institute (KASI) lunisolar data.
- Transparent methodology — The 24 solar terms use an astronomical approximation and holidays follow statutory rules; estimates are clearly labeled.
All results are for reference only. For exact dates, please confirm with official sources such as the Korea Astronomy and Space Science Institute and the Ministry of the Interior and Safety.
Last updated: 2026-06-25