r - as.Date() does not respect POSIXct time zones -

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okay here subtle "quirk" in r as.date function converting posixct timezone, wondering if bug. 

> as.posixct("2013-03-29", tz = "europe/london") [1] "2013-03-29 gmt" > as.date(as.posixct("2013-03-29", tz = "europe/london")) [1] "2013-03-29"

so far no problem, but.....

> as.posixct("2013-04-01", tz = "europe/london") [1] "2013-04-01 bst" > as.date(as.posixct("2013-04-01", tz = "europe/london")) [1] "2013-03-31"

anybody seen this? bug or quirk? april fools?

the default time zone as.date.posixct "utc" (see page). try as.date(as.posixct("2013-04-01", tz = "europe/london"),tz = "europe/london").


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