The Horse—the seventh sign of the Chinese zodiac (used for years and birth signs).
来年は午年だから年賀状に馬の絵を描こう。
Next year is the Year of the Horse, so I'll draw a horse on my New Year's card.
彼は午年（うまどし）生まれだ。
He was born in the Year of the Horse.
Obsolete: the 'hour of the Horse'—a historical term for the midday period (roughly 11am–1pm); seen in old texts.
古文献には『午の刻に集合せよ』とある。
An old document says, 'Gather at the hour of the Horse.'
Obsolete: the south direction—an old usage in calendars or directional systems, now rarely used.
古代の記録で午は南を表すと説明されている。
Ancient records explain that '午' represents the south.
Obsolete: the fifth month of the lunar calendar—an old calendrical usage.
旧暦の記録では、午（五月）に祭事が行われたとある。
Lunar-calendar records note that festivals were held in '午' (the fifth month).