An abacus calendar is a sort of calendar that makes use of an abacus to characterize the times, months, and years. Abacus calendars have been first developed in China in the course of the Han Dynasty (206 BCE – 220 CE), they usually have been used for hundreds of years to maintain monitor of time. In contrast to trendy calendars, that are primarily based on the photo voltaic 12 months, abacus calendars are primarily based on the lunisolar 12 months, which is the time it takes for the moon to orbit the Earth 12 occasions. Due to this fact, the size of every month in an abacus calendar can range between 29 and 30 days.
Abacus calendars are nonetheless used at this time in some elements of the world, significantly in East Asia. They’re usually used for non secular functions, similar to figuring out the dates of festivals and holidays, they usually can be used for sensible functions, similar to protecting monitor of appointments and occasions. Abacus calendars are a precious software for anybody who’s fascinated with studying extra about Chinese language tradition and historical past, they usually can be a enjoyable and academic technique to study in regards to the fundamentals of astronomy.
