Traditional Culture Encyclopedia - Almanac inquiry - Why are there cows in the yellow calendar?

Why are there cows in the yellow calendar?

Because in the first month, it is the Spring Festival, so every household should kill pigs and sheep. At this time, pigs are the most dead. In May, farmers were farming, so at this time, cows were the hardest. The first month is a pig, and May is a cow, which are used to describe the hardest and most dangerous time for people!