夏令时标准答案: " l$ ?. f" r5 D7 J+ J' l ' b3 s3 _* k8 j; HDaylight Saving Time begins for most of the United States at 2 a.m. on the first Sunday of April. Time reverts to standard time at 2 a.m. on the last Sunday of October. $ Y. G4 E7 ?' v$ ?1 P % a# m7 `+ ~7 O. }2 HThat means, 今年是10月28号零晨两点调整时间。