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 Eul (을, 乙) is the yin of Wood.
The branch Sa (사, 巳) is the yin of Fire.
Sa carries Byeong (병, 丙), Gyeong (경, 庚), Mu (무, 戊) inside it. Korean calls these 지장간 — the stems hidden in a branch.
The stem's element is the one that gives rise to the branch's.
On the calendar
Sa is the character for the month that opens at Ipha (Start of Summer), and for the hours from 9am to 10:59am.
It sits 42nd in the cycle of sixty. Days run in that order, so the same two characters come back every sixty days.
Days that were Eul-sa 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 Eul-sa in 2026
Days that were Eul-sa in 2025
Days that were Eul-sa in 2024
Days that were Eul-sa in 2023
Days that were Eul-sa in 2022
Days that were Eul-sa in 2021
Days that were Eul-sa in 2020
Days that were Eul-sa in 2019
Days that were Eul-sa in 2018
Days that were Eul-sa in 2017
Days that were Eul-sa in 2016
Days that were Eul-sa in 2015
Days that were Eul-sa in 2014
Days that were Eul-sa in 2013
Days that were Eul-sa in 2012
Days that were Eul-sa in 2011
Days that were Eul-sa in 2010
Days that were Eul-sa in 2009
Days that were Eul-sa in 2008
Days that were Eul-sa in 2007
Days that were Eul-sa in 2006
Days that were Eul-sa in 2005
Days that were Eul-sa in 2004
Days that were Eul-sa in 2003
Days that were Eul-sa in 2002
Days that were Eul-sa in 2001
Days that were Eul-sa in 2000
Days that were Eul-sa in 1999
Days that were Eul-sa in 1998
Days that were Eul-sa in 1997
Days that were Eul-sa in 1996
Days that were Eul-sa in 1995
Days that were Eul-sa in 1994
Days that were Eul-sa in 1993
Days that were Eul-sa in 1992
Days that were Eul-sa in 1991
Days that were Eul-sa in 1990
Days that were Eul-sa in 1989
Days that were Eul-sa in 1988
Days that were Eul-sa in 1987
Days that were Eul-sa in 1986
Days that were Eul-sa in 1985
Days that were Eul-sa in 1984
Days that were Eul-sa in 1983
Days that were Eul-sa in 1982
Days that were Eul-sa in 1981
Days that were Eul-sa in 1980
Days that were Eul-sa in 1979
Days that were Eul-sa in 1978
Days that were Eul-sa in 1977
Days that were Eul-sa in 1976
Days that were Eul-sa in 1975
Days that were Eul-sa in 1974
Days that were Eul-sa in 1973
Days that were Eul-sa in 1972
Days that were Eul-sa in 1971
Days that were Eul-sa in 1970
Days that were Eul-sa in 1969
Days that were Eul-sa in 1968
Days that were Eul-sa in 1967
Days that were Eul-sa in 1966
Days that were Eul-sa in 1965
Days that were Eul-sa in 1964
Days that were Eul-sa in 1963
Days that were Eul-sa in 1962
Days that were Eul-sa in 1961
Days that were Eul-sa in 1960
Days that were Eul-sa in 1959
Days that were Eul-sa in 1958
Days that were Eul-sa in 1957
Days that were Eul-sa in 1956
Days that were Eul-sa in 1955
Days that were Eul-sa in 1954
Days that were Eul-sa in 1953
Days that were Eul-sa in 1952
Days that were Eul-sa in 1951
Days that were Eul-sa 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.