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 Sin (신, 辛) is the yin of Metal.
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 branch's element is the one that governs the stem'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 18th in the cycle of sixty. Days run in that order, so the same two characters come back every sixty days.
Days that were Sin-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 Sin-sa in 2026
Days that were Sin-sa in 2025
Days that were Sin-sa in 2024
Days that were Sin-sa in 2023
Days that were Sin-sa in 2022
Days that were Sin-sa in 2021
Days that were Sin-sa in 2020
Days that were Sin-sa in 2019
Days that were Sin-sa in 2018
Days that were Sin-sa in 2017
Days that were Sin-sa in 2016
Days that were Sin-sa in 2015
Days that were Sin-sa in 2014
Days that were Sin-sa in 2013
Days that were Sin-sa in 2012
Days that were Sin-sa in 2011
Days that were Sin-sa in 2010
Days that were Sin-sa in 2009
Days that were Sin-sa in 2008
Days that were Sin-sa in 2007
Days that were Sin-sa in 2006
Days that were Sin-sa in 2005
Days that were Sin-sa in 2004
Days that were Sin-sa in 2003
Days that were Sin-sa in 2002
Days that were Sin-sa in 2001
Days that were Sin-sa in 2000
Days that were Sin-sa in 1999
Days that were Sin-sa in 1998
Days that were Sin-sa in 1997
Days that were Sin-sa in 1996
Days that were Sin-sa in 1995
Days that were Sin-sa in 1994
Days that were Sin-sa in 1993
Days that were Sin-sa in 1992
Days that were Sin-sa in 1991
Days that were Sin-sa in 1990
Days that were Sin-sa in 1989
Days that were Sin-sa in 1988
Days that were Sin-sa in 1987
Days that were Sin-sa in 1986
Days that were Sin-sa in 1985
Days that were Sin-sa in 1984
Days that were Sin-sa in 1983
Days that were Sin-sa in 1982
Days that were Sin-sa in 1981
Days that were Sin-sa in 1980
Days that were Sin-sa in 1979
Days that were Sin-sa in 1978
Days that were Sin-sa in 1977
Days that were Sin-sa in 1976
Days that were Sin-sa in 1975
Days that were Sin-sa in 1974
Days that were Sin-sa in 1973
Days that were Sin-sa in 1972
Days that were Sin-sa in 1971
Days that were Sin-sa in 1970
Days that were Sin-sa in 1969
Days that were Sin-sa in 1968
Days that were Sin-sa in 1967
Days that were Sin-sa in 1966
Days that were Sin-sa in 1965
Days that were Sin-sa in 1964
Days that were Sin-sa in 1963
Days that were Sin-sa in 1962
Days that were Sin-sa in 1961
Days that were Sin-sa in 1960
Days that were Sin-sa in 1959
Days that were Sin-sa in 1958
Days that were Sin-sa in 1957
Days that were Sin-sa in 1956
Days that were Sin-sa in 1955
Days that were Sin-sa in 1954
Days that were Sin-sa in 1953
Days that were Sin-sa in 1952
Days that were Sin-sa in 1951
Days that were Sin-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.