EconomyDaye is an industrial city, a center of mining and metallurgy, both ferrous and non-ferrous; its name means 'developing a prosperous smelting industry' (). Copper mining and smelting was conducted at Daye's Tonglüshan Mine (:zh:铜绿山古铜矿遗址, 铜绿山, ) as early as the Spring and Autumn period (6th century B.C.E.), if not earlier. Tonglüshan Mine is located just southwest of the modern city, and now has a museum. Although such copper-containing minerals as malachite and azurite are found here, the local ores are richer in iron than in copper, and the modern Daye is better known for its iron ore mining and processing. Among the major employers is Huangshi Daye Non-ferrous Metals Co., Ltd.
TransportationDaye was the junction of the Wuhan-Daye Railway (completed in 1958) and Daye-Shahejie Railway (completed in 1987), which merged in 1989 to form the Wuhan–Jiujiang Railway. Huangshi Railway Station, which is the main passenger station for the entire Huangshi metropolitan area, is located within Daye's administrative borders, about north of downtown Daye (). It has fairly frequent service, with travel time to Wuhan being typically around 1 hour on a high-speed D-series train, or 1.5 hours on a "conventional" passenger train. Daye is served by the Wuhan–Huangshi Intercity Railway, part of the future Wuhan Metropolitan Area Intercity Railway, which opened in 2014. The new Daye North Railway Station, located north-east of Daye's main urban area (), serves as that line's terminal. It has fairly frequent service (about hourly) to the Wuhan Railway Station. Construction work is carried out to extent this rail line beyond Daye; this will become the Wuhan–Jiujiang Passenger Railway (estimated completion date, 2017). Daye is also served by the China National Highway 106 (which coincides in this area with China National Highway 316).
HistoryImage:Yangtze kiang 1915-section-Wuchang-to-Wuxue.jpg, left, Ta-yeh (Daye) and Tie-shan-pu (Tieshan District, Tieshan) shown in the middle of this 1915 map, along with an early railway. Lake Daye south of town is labeled as ''L. Kin-hu'' (i.e. Jinhu, "Golden Lake") Daye County existed on and off for centuries; as recently as the World War II period, it included much of today's prefecture-level city of Huangshi. This means that pre-1949 references to a location in "Daye" or "Tayeh" may refer to anywhere within today's Huangshi. Daye County was re-established on June 1, 1962, on a rather smaller scale, as part of Huangshi City. On February 18, 1994 Daye was converted into a county-level city, still within the prefecture-level city of Huangshi.
DialectThe speech of Daye and the adjacent counties farther south (toward the Jiangxi border) has been traditionally characterized as the Daye dialect, part of the Datong dialect group of Gan Chinese.