also: き
noun
sixth sign of the Chinese sexagenary cycle; 6th in rank
Refers to the sixth celestial stem (己) in the traditional Chinese calendar system, often used in combination with earthly branches to form the sexagenary cycle. The reading つちのと is the native Japanese name; き is the Sino-Japanese reading.
今年は己の年です。
This year is the year of the sixth celestial stem.
十干では、己は六番目にあたる。
In the ten celestial stems, 己 corresponds to the sixth.