Full_Name: Peng Liu Version: 1.7.1 OS: XP Home Submission from: (NULL) (128.109.14.2)
strptime(c("80040601"),format="%y%m%d%H")
[1] "1980-04-06 01:00:00"
strptime(c("80040602"),format="%y%m%d%H")
[1] "1980-04-06 01:00:00" Convert incorrectly.