I have a date and time value which I'm using POSIXct to store in a variable. and when I use as.Date the date is different - why ?
x<-as.POSIXct("2012-02-25 19:00:00")
as.Date(x)
[1] "2012-02-**26**"
Why is it incrementing day by 1?
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Sri
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2What are your time zone and locale? See if you get the same with `x <- as.POSIXct("2012-02-25 19:00:00", tz = " ")`. – Oct 22 '15 at 13:19
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Yes I get the correct date, I'm in EST. what does tz=" " do? – Sri Oct 22 '15 at 13:21
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It set the time zone as blank. – Oct 22 '15 at 13:24
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By simply using x<-as.POSIXct("2012-02-25 19:00:00") you will be setting the time zone, tz, to your current systems time zone, EST.
However when you use as.Date without declaring a time zone it will default to GMT. GMT is 5 hours ahead of EST so 25/02/2012 19:00 is 00:00 26/02/2012.
amwill04
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