是否有可靠的方法来检测表示由于DST而不存在的时间的POSIXlt对象？

I have the following problem: the date column in data I get contains dates that do not exist due to daylight saving time. (For example 2015-03-29 02:00 does not exist in Central European Time, because the clock gets set directly from 01:59 to 03:00 because DST takes effect on this day)I have the following problem: the date column i