Weton Jawa is a calendar tradition for the Javanese people which is commonly used to take into account various things, one of which is related to mate.
Weton mate itself is believed to provide an overview of the suitability of two people who are about to get married.
Especially if you remember that marriage is a very sacred and important thing, it is not surprising that many Javanese people still adhere to good and bad calculations and whether or not household life is appropriate through weton.
Javanese Weton itself is not only used to predict compatibility between couples who are about to marry.
Because there are many weton calculations that are trusted by the Javanese to predict other holidays, for example to find out the forecast for the planting season, rainy season, dry season, and so on.