Hello I have trouble getting my original datetime back see below. I hope I
am missing something. Please help.


> tt <- as.POSIXct("2011-01-07 07:49:13", tz="EST")
> tt
[1] "2011-01-07 07:49:13 EST"
> ttn <- as.numeric(tt)
> ttn
[1] 1294404553
> tt <- as.POSIXct(ttn,origin='1970-01-01',tz="EST")
> tt
[1] "2011-01-07 12:49:13 EST"
>

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