Baja California Sur Chihuahua Nayarit: Except for the Bahía de Banderas municipality, which uses the Central Time Zone. Sonora – no daylight saving time, always on MST. Sinaloa Revillagigedo Islands (Colima): three of the four islands have the same time as Mountain Time Zone, Isla Socorro, San Benedicto Island and Roca Partida.