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Have you ever heard someone say, "Don't get married in the month of Suro, or your marriage will be full of bad luck"? Or if your weton (birth date) doesn't match, your business could go bankrupt? In Javanese society, the Javanese calendar is still a part of everyday life. This system is used for various things, from determining good and bad days, matching partners, to traditional market schedules in rural areas. But how accurate is this system really? Does the Javanese calendar really have a scientific basis, or is it simply a cultural heritage that persists because of tradition? In this video, we will explore the history of the Javanese calendar, understand how it is calculated, and see how this system is still used today. Buddhist friends, let's delve deeper into the Javanese calendar by understanding how this system developed and survived over the centuries. But before that, don't forget to subscribe to the Suaka Cerita channel and turn on the bell to stay connected with interesting stories about Javanese history and culture. Ah, the Javanese calendar became the main calendar system in the Islamic Mataram region and still survives today, especially in the traditions and beliefs of the Javanese people. Ohh. Every year. For example, if we look at one Suro in two consecutive years, we can see how these dates shift. The first Suro of 1958 in Java corresponds to July 19, 2024 AD. Meanwhile, the first Suro of 1959 in Java corresponds to July 7, 2025 AD. Furthermore, what makes the Javanese calendar so unique is its market cycle. Unlike the Gregorian calendar, which has 7 days in a week, the Javanese calendar has a market cycle consisting of 5 days: Li, Pahing, Pon, Wage, and Kliwon. This market cycle runs concurrently with the 7-day week. Therefore, each date in the Javanese calendar has a combination of a Gregorian day and a market day. For example, someone born on a Tuesday Kliwon. This combination will repeat after 35 days because 7 Gregorian days multiplied by 5 market days equals 35 days. Therefore, a person's weton will repeat every 35 days. Now let's see how to determine a person's weton and neptu based on their birth date in the Javanese calendar. For example, we will calculate the weton and neptu of someone born in March 2000. The first step is to determine the Gregorian day. March 21, 2000, fell on a Tuesday in the Gregorian calendar. The next step is to determine the Javanese market day. Based on the Javanese market cycle, which lasts for 5 days, March 21, 2000, fell on the Legi market day. And finally, we determine the neptu of the day and market. In the Neptu calculation system, each day and market has its own value. Tuesday has a value of 3, while Legi has a value of 5. By adding these two values, the total Neptu is 8. So, someone born on March 21, 2000, had a weton of Tuesday Legi with a Neptu of 8. This Neptu is later used in Javanese primbon to determine a person's character, compatibility with life partners, and luck in life. After understanding how the Javanese calendar works, the question arises: is this system in accordance with modern science? Do the calculations of weton, neptu, and the windu cycle have a scientific basis, or are they simply a cultural legacy passed down from generation to generation? From an astronomical and mathematical perspective, the Javanese calendar has several scientific elements that can be logically explained. First, the Javanese calendar uses a lunar-based calculation system similar to the Hijri calendar. This calculation aligns with the lunar phase cycle, which can be accurately calculated in astronomy. This cycle is used in various other calendars, including the Islamic and Chinese calendars, to determine the beginning of a new month based on the moon's movement relative to the Earth. Furthermore, the market day system in the Javanese calendar also follows a modular mathematical pattern. The 7-day Gregorian calendar combined with the 5-day Javanese market day results in a cycle repeating every 35 days. This pattern has a predictable mathematical regularity, similar to the repeating pattern in modular number theory used in mathematics. However, while some aspects of the Javanese calendar have a scientific basis, others are more cultural and traditional. In Javanese belief, a person's weton is believed to influence personality, fortune, and marital compatibility. From a psychological and social science perspective, there is no scientific research proving that a person's birth date truly influences their personality and luck in life. A person's character is more influenced by their environment, education, and life experiences, not solely by the combination of their birth date and market. However, while not all aspects of the Javanese calendar can be explained by science, we cannot simply dismiss it as worthless. The Javanese calendar is a cultural heritage that has been used for centuries and holds significant significance for the Javanese people. This system is not just a tool for managing time, but also reflects the Javanese way of thinking and philosophy of life. Now that we have discussed the history, calculations, and use of the Javanese calendar to date, the question remains: Is the Javanese calendar a precise science of calculation or simply a cultural legacy? On the one hand, this system uses lunar cycles and predictable modular mathematical patterns. However, many other aspects, such as a person's character, calculating auspicious days, and compatibility with a soulmate, are more based on belief and have not been scientifically proven. What do you think? Does the Javanese calendar have a scientific basis, or is it more based on ancestral traditions? Share your thoughts in the comments section. Don't forget to like and subscribe for more interesting content. See you in the next video. H
