How accurate is the lunar calendar?

The lunar calendar is generally considered to be accurate for tracking lunar phases and predicting celestial events such as eclipses. However, since the lunar month is about 29.5 days, the lunar calendar can drift from the solar calendar, which has a year of 365 days. To compensate for this discrepancy, some lunar calendars include an intercalary month periodically to keep it aligned with the solar calendar. Additionally, different cultures have slightly different lunar calendars, leading to some variations in accuracy. Overall, the accuracy of the lunar calendar depends on how it is constructed and maintained.