Astronomy and the Wari-Wari Traditions of the Karo Tribe: Determining Good and Bad Days

The Wari-Wari tradition of the Karo tribe is a calendar system used to determine good and bad days in various aspects of life. However, knowledge of this system is starting to fade due to modernization and lifestyle changes. This research aims to examine the relationship between astronomy and Wari-Wari and identify the factors that led to its decline. Rahmadi's (2022) relevant dating system theory was used to examine the relationship and tradition of the karo tribe's wari-wari: the determination of good and bad days. A qualitative approach was used with natural observation methods and centered interviews in Suka Sipilihen Village, Tiga Panah Sub-district, Karo Regency. The results showed that Wari- Wari has an astronomical basis related to the movement of the moon and sun, but its understanding is diminishing due to the lack of cultural inheritance and written documentation. Modernization and shifting cultural values have also accelerated its extinction. This study emphasizes the importance of preserving the WariWari tradition through education and documentation to remain sustainable in the midst of changing times.