[R] Dates in read.spss

Thomas Lumley tlumley at u.washington.edu
Mon Apr 21 23:17:31 CEST 2003

On Mon, 21 Apr 2003, Frank E Harrell Jr wrote:

> I am using read.spss in the foreign package to read an SPSS save file.
> For date variables I get huge values such as 11489990400.  Does anyone
> know how to convert these values to R POSIXct date objects?  Thanks in
> advance -Frank

I believe it is


that is, the dates are seconds since 14 October 1584

I don't know if R and SPSS necessarily agree on how long ago that was on
all machines, though.


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