What is the origin of the 'evil calendar of crime stories'?

The 'evil calendar of crime stories' could have its roots in historical events. For example, if there were a series of crimes that occurred on specific dates over a period of time, people might start to associate those dates with evil. Writers and storytellers could then build on this, creating fictional crime stories set around those dates. As more and more of these stories were created, they gradually formed an 'evil calendar' of sorts.

The Gregorian calendar was introduced by Pope Gregory XIII in 1582. It was a reform of the Julian calendar. The main reason for the reform was to correct the inaccuracy in the Julian calendar regarding the length of the year. The Julian calendar had a slight miscalculation which caused the equinoxes and solstices to drift over time. The Gregorian calendar adjusted the leap year rules to be more accurate. For example, years divisible by 100 are not leap years, unless they are also divisible by 400.

The Muslim calendar, or Hijri calendar, originated from the migration (Hijra) of the Prophet Muhammad from Mecca to Medina in 622 CE. This event was so significant that it marked the starting point of the calendar. It is a lunar calendar, with months based on the cycles of the moon. Each month begins with the sighting of the new moon.

The Mayan calendar's origin is deeply rooted in Mayan religious and astronomical beliefs. It was developed to track time for religious ceremonies, agricultural activities, and to understand celestial events. The Mayans were highly skilled astronomers, and they observed the cycles of the sun, moon, and planets to create their complex calendar system.

The origin of the Chinese calendar can be traced back thousands of years. It was developed with a deep understanding of nature. In ancient China, people needed a way to mark time for agricultural activities. They watched the moon phases closely as the moon had a significant impact on tides and some aspects of farming. At the same time, they were aware of the solar year for longer - term seasonal changes. By integrating these two aspects, they created a calendar system that was not only useful for farming but also for cultural and religious purposes.

The Mayan calendar originated from the advanced astronomical observations and mathematical calculations of the Mayan civilization. They developed it to track celestial movements and mark important events.

The Chinese calendar has a long and complex history. It originated from ancient observations of celestial phenomena and agricultural cycles.

The origin of the Hebrew calendar is quite complex. It emerged from the need to synchronize religious observances with celestial cycles. It involves detailed calculations and has evolved through centuries of Jewish tradition and scholarship.

The Muslim calendar has its roots in Islamic traditions. It was developed to serve as a means of chronological reckoning within the Islamic context. The starting point is often associated with significant events and religious teachings.

One key element is astronomical observation. The Chinese observed the moon's phases for the lunar part of the calendar. Another is the need for agricultural timing. They had to know when to plant and harvest. Also, the awareness of the solar cycle was important as it related to the changing of seasons.