When does Daylight Saving Time change in Mexico 2009?

Daylight Saving Time begins at 2:00 a.m. local time on the first Sunday in April. On the last Sunday in October areas on Daylight Saving Time fall back to Standard Time at 2:00 a.m. The names in each time zone change along with Daylight Saving Time. Central Standard Time (CST) becomes Central Daylight Time (CDT), and so forth. The state of Sonora does not observe Daylight Saving Time.