clash
When the earthly branch of the day clashes with the earthly branch of a particular zodiac animal. The six clashes are: Rat-Horse, Ox-Goat, Tiger-Monkey, Rabbit-Rooster, Dragon-Dog, Snake-Pig. A note in the almanac saying 'clash Horse' means people born in the Year of the Horse are clashed on that day.
Clash is an important concept in date selection (擇日術), referring to a direct opposition between the earthly branch of the day and that of a zodiac animal. The six earthly branch clashes are: Rat-Horse, Ox-Goat, Tiger-Monkey, Rabbit-Rooster, Dragon-Dog, Snake-Pig. Phrases like 'clash Horse' or 'clash Rat' commonly found in almanacs indicate the day has a clashing influence on people with that zodiac sign. Traditionally, it was believed that a person being clashed would have unstable luck on that day, and it was recommended to avoid important activities like opening a business, signing contracts, or long journeys. However, in modern times, this is no longer used as a primary basis for decision-making.