夏令时开始和结束的时间

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