2009到2015年，美国，加拿大夏令时起始时间表。
2 a.m. on the Second Sunday in March（三月第二个周日的凌晨2点开始夏令时）
to
2 a.m. on the First Sunday of November. （十一月第一个周日的凌晨2点结束夏令时）
| Year | DST Begins 2 a.m. (Second Sunday in March) |
DST Ends 2 a.m. (First Sunday in November) |
|---|---|---|
| 2009 | March 8 | November 1 |
| 2010 | March 14 | November 7 |
| 2011 | March 13 | November 6 |
| 2012 | March 11 | November 4 |
| 2013 | March 10 | November 3 |
| 2014 | March 9 | November 2 |
| 2015 | March 8 | November 1 |