How do the signs alternate in the Eastern calendar?

The Eastern calendar is a lunisolar calendar, meaning that it is based on both the movement of the moon and the position of the sun. This calendar is used by many cultures around the world, including the Chinese, Japanese, Korean, and Vietnamese.

The Eastern calendar is divided into 12 lunar months. Each month begins with the new moon and ends with the full moon. The lunar months are further divided into four 7-day weeks. The 7-day weeks are based on the phases of the moon, with the first day of the week being the day of the new moon.

The signs of the Eastern calendar alternate between yin and yang, which represent the dualistic nature of the universe. Yin is associated with the feminine, dark, and passive aspects of life, while yang is associated with the masculine, light, and active aspects of life.

The first day of the week is always a yin day, followed by a yang day. This alternation continues for the entire week, with the seventh day of the week being the same sign as the first day. This pattern then repeats for each week of the month.

At the end of the month, the sign of the first day of the next month will be the opposite of the sign of the last day of the previous month. This pattern of alternating yin and yang continues throughout the year, creating a cycle of balance.