About December 2026
December 2026 has 31 days. On the Korean lunar calendar it runs from lunar month 10, day 23, 2026 to lunar month 11, day 23, 2026. In the sexagenary cycle the lunar year is 2026: 丙午 (byeong-o).
The new moon (day 1 of a lunar month) falls on December 9, and day 15 on December 23. Day 15 is a calendar date, so the fullest moon can be a day off.
Solar terms this month
- Major Snow (大雪) — begins December 7 at 11:53 KST, when the Sun reaches 255° ecliptic longitude: heavy snow falls.
- Winter Solstice (冬至) — begins December 22 at 05:50 KST, when the Sun reaches 270° ecliptic longitude: the longest night of the year.
Lunar months in this solar month: month 10 (30 days), month 11 (30 days). A lunar month has 29 or 30 days depending on the Moon's cycle.
Public holidays and workdays
Public holidays this month: December 25 (Christmas Day). Of 23 weekdays, 22 are workdays.
Long weekends and leave this month
Breaks of 3+ days made of weekends and public holidays: Fri, Dec 25 ~ Sun, Dec 27 (3 days, Christmas Day).
No single or double day of leave this month joins a longer break. Plan all your leave days: leave planner →
How to read the day pillar and solar terms
The day pillar (iljin) is the sexagenary name given to each day. Ten heavenly stems and twelve earthly branches pair up in turn, so the same name returns every 60 days. A manseryeok lists the pillars of the year, month, day and hour, and the day pillar in Korean saju (Four Pillars) is the day pillar of the birth date.
The 24 solar terms divide the Sun’s path into 15° steps. They follow the solar calendar, so they fall on nearly the same dates every year, and each begins at an exact minute. Times are Korea Standard Time (UTC+9).
Lunar dates and day pillars come from the korean-lunar-calendar library (Korea Astronomy and Space Science Institute tables). Solar term times come from the manseryeok library, matched to KASI’s tables to the minute.