The first clock installed outside of the family farm was the clock for the Santiago Apostol Church in Chignahuapan in 1919, which took a year to build. This clock is still working. The next clock was installed in Libres in 1921. The name Relojes Centenario was adopted that same year, the centennial of the end of the Mexican War of Independence. It is the first maker of monumental clocks in Latin America. In 1930, Olvera Hernandez founded his own homestead called La Quinta María where he installed the second workshop of Centenario. The current location in the center of Zacatlán was acquired in 1966, allowing the company to increase production. In 1975, the business became a legal corporation. In 1982, the business opened an office in Mexico City in Colonia Tepeyac Insurgentes. In 1986, the company construction the floral clock located in the main square of Zacatlán. It has two faces five meters in diameter controlled by the same mechanism and nine mechanical carillons. This clocks chimes a variety of tunes. The clock is the first of its type and has become a symbol for the town. In 1993, the clock museum was inaugurated, named after Olvera Hernandez. The gift shop, called the “La Casa del Tiempo” was opened in 2003. In the 2000s, the company experimented with digital chimes including those programmed for funeral songs and “Ave Maria.” According to general manager José Luis Olvera Charolet, each clock is unique with no two quite the same. One of the most notable clocks by the company is the flower clock in the Parque Hundido in Mexico City, one of the largest in the world, which occupies a space of 78 m2 and has a ten meter wide face. Another clock is that in the Nuestra Señora del Roble basilica in Monterrey, which has four faces of four meters in diameter each. The floral clock in Zacatlán was installed in 1986. It has nine different melodies and which get played depend on the time of year and time of day, playing four times each 24-hour period. The hours of this clock are 6am, 10am, 2pm and 9pm in order not to interfere with the hours of mass. Another clock is in Tulantepec, Hidalgo (near Tulancingo), which chimes the national anthem at 6am and 6pm along with the “Himno Guadalupano” dedicated to the Virgin of Guadalupe.