The Balinese calendar system consists of two calendars that are used simultaneously, namely the wuku calendar and the 210-day calendar. The wuku calendar consists of 30 weeks a year, with each week having 7 days. Meanwhile, the 210-day calendar consists of 6 seasons in a year, with each season having 35 days. These two calendars are used to determine important days in Balinese religion, such as holidays and religious ceremonies.

To use the Balinese calendar system, it is first necessary to know the names of the days and weeks in the wuku calendar and the names of the seasons in the 210-day calendar. Then, it can be used to determine important days in Balinese religion, such as holidays and religious ceremonies. For example, the wuku calendar is used to determine days that are suitable for carrying out religious ceremonies or days that are prohibited from carrying out certain activities. Meanwhile, the 210-day calendar is used to determine the harvest season and dry season, as well as to determine suitable days for holding weddings or other events.

To determine which days are suitable or not suitable for an activity, tools such as statues or pictures can be used that show combinations of days and times or seasons that are suitable or not suitable for that activity.

But keep in mind, this calendar system is used more in Balinese religion and culture, rather than in daily activities.