A lunisolar calendar is a type of calendar that combines both the phases of the moon and the position of the sun to track time. It typically uses lunar months, which are based on the moon's cycles, while also aligning with the solar year to ensure that seasons remain consistent. This dual approach helps in agricultural planning and cultural events. Many cultures, such as the Chinese and Hebrew communities, utilize lunisolar calendars. For instance, the Chinese calendar features months that alternate between 29 and 30 days, with an extra month added periodically to keep the calendar in sync with the solar year.