R POSIXct and as.Date -

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i have date , time value i'm using posixct store in variable. , when use as.date date different - why ?

x<-as.posixct("2012-02-25 19:00:00") as.date(x)  [1] "2012-02-**26**"

why incrementing day 1?

by using x<-as.posixct("2012-02-25 19:00:00") setting time zone, tz, current systems time zone, est.

however when use as.date without declaring time zone default gmt. gmt 5 hours ahead of est 25/02/2012 19:00 00:00 26/02/2012.


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