noun
the Rat (first sign of the Chinese zodiac)
Refers to the first animal of the twelve-year cycle. Used in expressions like 子年 (year of the Rat).
来年は子年です。
Next year is the Year of the Rat.
noun
hour of the Rat (around midnight)
Obsolete timekeeping term; the hour of the Rat corresponds roughly to 11 p.m.–1 a.m. or midnight–2 a.m. in the old Japanese temporal system. Mainly encountered in historical contexts or the compound 子の刻.
See also: 子の刻
子の刻に怪談を語るのが江戸の趣向だった。
Telling ghost stories at the hour of the Rat was an Edo-period pastime.
noun
Obsolete directional use based on the Chinese zodiac–compass association. In modern Japanese, 北 is used instead.
古い方位の言い方では、子は北を指した。
In the old directional system, 子 indicated north.
noun
eleventh month of the lunar calendar
Obsolete calendar term; the eleventh month of the old lunar calendar was associated with the Rat. Not used in the modern Gregorian calendar.
旧暦の十一月は子の月とも呼ばれた。
The eleventh month of the lunar calendar was also called the month of the Rat.