Gregorian calendar is mutually harmful.

Zodiac collocation table for Chinese New Year marriage: rats: paired with cows, dragons and monkeys; Cattle: paired with rats, snakes and chickens; Tiger: Paired with dragons, horses and dogs; Rabbit: with dragons, snakes, horses, sheep, monkeys and chickens; Dragon: Paired with rats, tigers, rabbits, snakes, horses, monkeys, chickens, dogs and pigs; Snakes: pair with pigs and dogs: pair with tigers, rabbits, snakes, horses and pigs. Pigs are paired with rabbits, dragons, snakes, chickens and dogs. Marry rats: marry cows, rabbits, dragons, monkeys, chickens, dogs and cows: marry rats, dragons, snakes, pigs and tigers: marry rabbits, horses, dogs and rabbits: marry rats and tigers.