Due to constant global shift, the monument no longer lies on the exact line of the Equator. In 2005, the true Equatorial line was recorded a short distance south of the monument and, according to GPS readings, the line continues to move south. Despite this increasing inaccuracy, the city of Pontianak holds a party each year during the time of the spring and autumn solstices, when the shadows of the monument and everything around it disappear at noon.