An 18th-century Ching almanac even lists the daily times of sunrise and sunset for various locations around the empire. With the founding of the Republic in 1912, responsibility for putting out the almanac was taken over by the Central Observatory, under the Ministry of Education.
曆算在此時更為進步，以乾隆十八年歲次癸酉時憲書為例：這部曆書的編法，已知節氣的時刻應按緯度不同有所區分，不能以一地節氣涵蓋全國。