Beginning in 2007: Daylight Saving Time begins at 2 a.m. on the second Sunday of March Daylight Saving Time ends at 2 a.m. on the first Sunday of November. The corresponding time zones in Canada also switch to Daylight Saving Time on the same dates.aylight Saving Time begins at 2 a.m. on the first Sunday of April Daylight Saving Time ends at 2 a.m. on the last Sunday of October.