Playing cards come in four suits: spades, hearts, diamonds, and clubs. These suits have different names. The French call them "spear, heart, square, clove leaf," the Germans "leaf, heart, bell, acorn," and the Italians "sword, coin, stick, goblet."
Later, based on astronomical calendars, Westerners standardized the cards, setting the total to 54 cards in four suits. Over time, this standard gradually became consistent.
There are many ways to play playing cards, the most common being bridge, poker, blackjack, 21, and 24, among others. Because the number of cards in a deck of cards corresponds to the astronomical calendar, it is said that playing cards are a microcosm of the calendar. The reasons are as follows: A deck of 54 cards represents the 52 weeks in a year. Two suits are used: the Joker (Big Joker) represents the sun, and the other Joker (Little Joker) represents the moon. The four suits (Spades, Hearts, Diamonds, Clubs) represent the four seasons: spring, summer, autumn, and winter. Red cards represent daytime, and black cards represent nighttime. Each season has 13 weeks, which corresponds to the number of cards in each suit. The sum of the points on all 52 cards is 364. Adding the Joker's point gives 365, the same as the number of days in a normal year. Adding the Joker's point again gives the number of days in a leap year. The King, Queen, and Jack cards, totaling 12, represent both the 12 months in a year and the 12 constellations the sun passes through during the year.
