[R] POSIXct bug?

[Spencer Graves]

      In R 2.0.1 under Windows 2000, at least in some cases, as.POSIXct 
adds one to the date: 

 > March1.1959.POSIXct <- as.POSIXct("1959-03-01")
 > March1.1959.POSIXlt <- as.POSIXlt("1959-03-01")
 >
 > (Mar2.59 <- as.Date(March1.1959.POSIXct))
[1] "1959-03-02"
 > as.Date(March1.1959.POSIXlt)
[1] "1959-03-01"
 >
 > as.Date(as.POSIXct(Mar2.59))
[1] "1959-03-02"
 > as.Date(as.POSIXct(as.character(Mar2.59)))
[1] "1959-03-03"
 > print(POSIX.i <- as.POSIXct("1959-03-01"))
[1] "1959-03-01 Pacific Standard Time"
 > for(i in 1:11){
+   print(date.i <- as.Date(POSIX.i))
+   print(POSIX.i <- as.POSIXct(as.character(date.i)))
+ }
[1] "1959-03-02"
[1] "1959-03-02 Pacific Standard Time"
[1] "1959-03-03"
[1] "1959-03-03 Pacific Standard Time"
[1] "1959-03-04"
[1] "1959-03-04 Pacific Standard Time"
[1] "1959-03-05"
[1] "1959-03-05 Pacific Standard Time"
[1] "1959-03-06"
[1] "1959-03-06 Pacific Standard Time"
[1] "1959-03-07"
[1] "1959-03-07 Pacific Standard Time"
[1] "1959-03-08"
[1] "1959-03-08 Pacific Standard Time"
[1] "1959-03-09"
[1] "1959-03-09 Pacific Standard Time"
[1] "1959-03-10"
[1] "1959-03-10 Pacific Standard Time"
[1] "1959-03-11"
[1] "1959-03-11 Pacific Standard Time"
[1] "1959-03-12"
[1] "1959-03-12 Pacific Standard Time"
 >      
      Comments? 

      Thanks for your help. 
      spencer graves