Which is more accurate, monochrome or bicolor?

Almanac, also known as almanac, almanac and so on. , should be the difference between perpetual calendar and almanac:

1, different historical origins

The perpetual calendar originated from Zu Ti, the monarch of Shang Dynasty, who observed the changes of the sun and the moon. After years of long-term observation and careful calculation, an accurate solar calendar has been worked out. The monarch named the solar calendar "perpetual calendar" to reward his behavior.

The yellow calendar (old yellow calendar) was obtained because ancient people imagined the movements and changes of celestial bodies on the basis of astrology and divination, and it was not until the Tang Dynasty that the yellow calendar was finally determined.

2, the time span is different

"Ten thousand years" in the perpetual calendar means a long time span, but it doesn't really mean ten thousand years. However, the time recorded in the perpetual calendar is still longer than that in the Gregorian calendar, including at least calendars of Gregorian calendar, lunar calendar, dry calendar, hijri calendar, annual calendar and other years, as well as information related to the Gregorian calendar, such as good or bad luck, holidays, reminders and so on.

Generally, the yellow calendar is printed and published on a yearly basis, and it can also display many sets of calendars, such as solar calendar, lunar calendar, and dry calendar. There are a lot of rules and contents related to seeking good fortune and avoiding evil.

3. Different record carriers

Due to the long time span, perpetual calendars are usually embodied in the form of electronic perpetual calendars or apps. The yellow calendar is usually displayed in the form of book printing or calendar.