Daylight saving time has been observed nationwide in Mexico beginning in 1996. For municipalities located less than 20 km from the US border, such as Ciudad Juárez, and the entire state of Baja California, it coincides with the longer extended daylight saving period adopted for 2007 in the United States. But in the rest of the country, daylight saving time is observed between 2 a.m. on the first Sunday in April through 2 a.m. on the last Sunday in October. Quintana Roo and Sonora do not observe DST.