The Middle Heaven Great Emperor of the North Pole Star of Purple Subtlety assists the Jade Emperor in administering the longitudes and latitudes of Heaven and Earth, the sun, the moon and stars, as well as the climate of the four seasons. He is honored as the 'Master of all stars, assistant sovereign of the three realms, correspondent with the Original Vital Breath and inferior only to Great Heaven'. In Daoist ritual, as well as the Three Pure Ones, the Four Heavenly Ministers are also worshipped. Each of the Four Heavenly Ministers has his own divine birthday: The Great Jade Emperor on the 9th of the first lunar month, the Middle Heaven Great Emperor of the North Pole Star of Purple Subtlety on the the 27th of the tenth month, the Great Heavenly Emperor of the Highest Palace of Polaris on the 2nd of the second month, and the Imperial Earth Goddess on the 18th of the third month. Many Daoists go to temples to burn incense on these days.