Day pillar

Gap-ja · 갑자

甲子

The two characters of the day someone was born. They come round every sixty days, and they are the third of the four pillars.

What it is made of

  • The stem Gap (갑, 甲) is the yang of Wood.
  • The branch Ja (자, 子) is the yang of Water.
  • Ja carries Gye (계, 癸) inside it. Korean calls these 지장간 — the stems hidden in a branch.
  • The branch's element is the one that gives rise to the stem's.

On the calendar

Ja is the character for the month that opens at Daeseol (Major Snow), and for the hours from 11pm to 12:59am.

It sits 1st in the cycle of sixty. Days run in that order, so the same two characters come back every sixty days.

Days that were Gap-ja in 2027

A day turns at midnight. For a birth between 11pm and midnight, some schools read the next day instead. CELESTRY reads it as the same day by default and lets you choose the other.

Days that were Gap-ja in 2026

Days that were Gap-ja in 2025

Days that were Gap-ja in 2024

Days that were Gap-ja in 2023

Days that were Gap-ja in 2022

Days that were Gap-ja in 2021

Days that were Gap-ja in 2020

Days that were Gap-ja in 2019

Days that were Gap-ja in 2018

Days that were Gap-ja in 2017

Days that were Gap-ja in 2016

Days that were Gap-ja in 2015

Days that were Gap-ja in 2014

Days that were Gap-ja in 2013

Days that were Gap-ja in 2012

Days that were Gap-ja in 2011

Days that were Gap-ja in 2010

Days that were Gap-ja in 2009

Days that were Gap-ja in 2008

Days that were Gap-ja in 2007

Days that were Gap-ja in 2006

Days that were Gap-ja in 2005

Days that were Gap-ja in 2004

Days that were Gap-ja in 2003

Days that were Gap-ja in 2002

Days that were Gap-ja in 2001

Days that were Gap-ja in 2000

Days that were Gap-ja in 1999

Days that were Gap-ja in 1998

Days that were Gap-ja in 1997

Days that were Gap-ja in 1996

Days that were Gap-ja in 1995

Days that were Gap-ja in 1994

Days that were Gap-ja in 1993

Days that were Gap-ja in 1992

Days that were Gap-ja in 1991

Days that were Gap-ja in 1990

Days that were Gap-ja in 1989

Days that were Gap-ja in 1988

Days that were Gap-ja in 1987

Days that were Gap-ja in 1986

Days that were Gap-ja in 1985

Days that were Gap-ja in 1984

Days that were Gap-ja in 1983

Days that were Gap-ja in 1982

Days that were Gap-ja in 1981

Days that were Gap-ja in 1980

Days that were Gap-ja in 1979

Days that were Gap-ja in 1978

Days that were Gap-ja in 1977

Days that were Gap-ja in 1976

Days that were Gap-ja in 1975

Days that were Gap-ja in 1974

Days that were Gap-ja in 1973

Days that were Gap-ja in 1972

Days that were Gap-ja in 1971

Days that were Gap-ja in 1970

Days that were Gap-ja in 1969

Days that were Gap-ja in 1968

Days that were Gap-ja in 1967

Days that were Gap-ja in 1966

Days that were Gap-ja in 1965

Days that were Gap-ja in 1964

Days that were Gap-ja in 1963

Days that were Gap-ja in 1962

Days that were Gap-ja in 1961

Days that were Gap-ja in 1960

Days that were Gap-ja in 1959

Days that were Gap-ja in 1958

Days that were Gap-ja in 1957

Days that were Gap-ja in 1956

Days that were Gap-ja in 1955

Days that were Gap-ja in 1954

Days that were Gap-ja in 1953

Days that were Gap-ja in 1952

Days that were Gap-ja in 1951

Days that were Gap-ja in 1950

A day pillar is not read on its own

The day pillar is one line of a four-line coordinate. Two people can share it and, with the other three lines different, not be alike.

CELESTRY reads all eight characters and writes down which of them each area was read from.

See your own coordinate