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 Gye (계, 癸) is the yin of Water.
The branch Chuk (축, 丑) is the yin of Earth.
Chuk carries Gi (기, 己), Gye (계, 癸), Sin (신, 辛) inside it. Korean calls these 지장간 — the stems hidden in a branch.
The branch's element is the one that governs the stem's.
On the calendar
Chuk is the character for the month that opens at Sohan (Minor Cold), and for the hours from 1am to 2:59am.
It sits 50th in the cycle of sixty. Days run in that order, so the same two characters come back every sixty days.
Days that were Gye-chuk 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 Gye-chuk in 2026
Days that were Gye-chuk in 2025
Days that were Gye-chuk in 2024
Days that were Gye-chuk in 2023
Days that were Gye-chuk in 2022
Days that were Gye-chuk in 2021
Days that were Gye-chuk in 2020
Days that were Gye-chuk in 2019
Days that were Gye-chuk in 2018
Days that were Gye-chuk in 2017
Days that were Gye-chuk in 2016
Days that were Gye-chuk in 2015
Days that were Gye-chuk in 2014
Days that were Gye-chuk in 2013
Days that were Gye-chuk in 2012
Days that were Gye-chuk in 2011
Days that were Gye-chuk in 2010
Days that were Gye-chuk in 2009
Days that were Gye-chuk in 2008
Days that were Gye-chuk in 2007
Days that were Gye-chuk in 2006
Days that were Gye-chuk in 2005
Days that were Gye-chuk in 2004
Days that were Gye-chuk in 2003
Days that were Gye-chuk in 2002
Days that were Gye-chuk in 2001
Days that were Gye-chuk in 2000
Days that were Gye-chuk in 1999
Days that were Gye-chuk in 1998
Days that were Gye-chuk in 1997
Days that were Gye-chuk in 1996
Days that were Gye-chuk in 1995
Days that were Gye-chuk in 1994
Days that were Gye-chuk in 1993
Days that were Gye-chuk in 1992
Days that were Gye-chuk in 1991
Days that were Gye-chuk in 1990
Days that were Gye-chuk in 1989
Days that were Gye-chuk in 1988
Days that were Gye-chuk in 1987
Days that were Gye-chuk in 1986
Days that were Gye-chuk in 1985
Days that were Gye-chuk in 1984
Days that were Gye-chuk in 1983
Days that were Gye-chuk in 1982
Days that were Gye-chuk in 1981
Days that were Gye-chuk in 1980
Days that were Gye-chuk in 1979
Days that were Gye-chuk in 1978
Days that were Gye-chuk in 1977
Days that were Gye-chuk in 1976
Days that were Gye-chuk in 1975
Days that were Gye-chuk in 1974
Days that were Gye-chuk in 1973
Days that were Gye-chuk in 1972
Days that were Gye-chuk in 1971
Days that were Gye-chuk in 1970
Days that were Gye-chuk in 1969
Days that were Gye-chuk in 1968
Days that were Gye-chuk in 1967
Days that were Gye-chuk in 1966
Days that were Gye-chuk in 1965
Days that were Gye-chuk in 1964
Days that were Gye-chuk in 1963
Days that were Gye-chuk in 1962
Days that were Gye-chuk in 1961
Days that were Gye-chuk in 1960
Days that were Gye-chuk in 1959
Days that were Gye-chuk in 1958
Days that were Gye-chuk in 1957
Days that were Gye-chuk in 1956
Days that were Gye-chuk in 1955
Days that were Gye-chuk in 1954
Days that were Gye-chuk in 1953
Days that were Gye-chuk in 1952
Days that were Gye-chuk in 1951
Days that were Gye-chuk 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.