JavaScript时区对于过去的夏令时转换规则是错误的

In 2007, the days that we switch to daylight savings time changed. Any date that falls within the extend range of DST prior to that change is reporting an incorrect timezone offset in Chrome and Firefox. It's like Firefox and Chrome don't pay attention to the fact that DST used to have different days.In 2007, the days that we switch to daylight sa