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% File src/library/base/man/as.Date.Rd
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% File src/library/base/man/as.Date.Rd
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% Part of the R package, https://www.R-project.org
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% Part of the R package, https://www.R-project.org
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% Copyright 1995-2022 R Core Team
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% Copyright 1995-2024 R Core Team
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% Distributed under GPL 2 or later
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% Distributed under GPL 2 or later
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\name{as.Date}
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\name{as.Date}
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\alias{format.Date}
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\alias{format.Date}
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\alias{as.character.Date}
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\alias{as.character.Date}
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\method{as.Date}{character}(x, format, tryFormats = c("\%Y-\%m-\%d", "\%Y/\%m/\%d"),
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\method{as.Date}{character}(x, format, tryFormats = c("\%Y-\%m-\%d", "\%Y/\%m/\%d"),
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optional = FALSE, \dots)
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optional = FALSE, \dots)
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\method{as.Date}{numeric}(x, origin, \dots)
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\method{as.Date}{numeric}(x, origin, \dots)
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\method{as.Date}{POSIXct}(x, tz = "UTC", \dots)
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\method{as.Date}{POSIXct}(x, tz = "UTC", \dots)
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\method{format}{Date}(x, \dots)
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\method{format}{Date}(x, format = "\%Y-\%m-\%d", \dots)
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\method{as.character}{Date}(x, \dots)
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\method{as.character}{Date}(x, \dots)
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}
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}
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\arguments{
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\arguments{
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\item{x}{an object to be converted.}
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\item{x}{an object to be converted.}
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\item{format}{\code{\link{character}} string. If not specified, it will try
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\item{format}{a \code{\link{character}} string. If not specified when
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converting from a character representation, it will try
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\code{tryFormats} one by one on the first non-\code{NA} element, and
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\code{tryFormats} one by one on the first non-\code{NA} element, and
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give an error if none works. Otherwise, the processing is via
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give an error if none works. Otherwise, the processing is via
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\code{\link{strptime}()} whose help page describes available
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\code{\link{strptime}()} whose help page describes available
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conversion specifications.}
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conversion specifications.}
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\item{tryFormats}{\code{\link{character}} vector of \code{format}
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\item{tryFormats}{\code{\link{character}} vector of \code{format}
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(instead of signalling an error) if the format guessing does not succeed.}
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(instead of signalling an error) if the format guessing does not succeed.}
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\item{origin}{a \code{Date} object, or something which can be coerced by
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\item{origin}{a \code{Date} object, or something which can be coerced by
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\code{as.Date(origin, \dots)} to such an object or
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\code{as.Date(origin, \dots)} to such an object or
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\code{\link{missing}}. In that case, \code{"1970-01-01"} is used.}
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\code{\link{missing}}. In that case, \code{"1970-01-01"} is used.}
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\item{tz}{a time zone name.}
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\item{tz}{a time zone name.}
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\item{\dots}{further arguments to be passed from or to other methods,
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\item{\dots}{further arguments to be passed from or to other methods.}
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including \code{format} for \code{as.character} and \code{as.Date}
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methods.}
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}
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}
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\details{
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\details{
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The usual vector re-cycling rules are applied to \code{x} and
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The usual vector re-cycling rules are applied to \code{x} and
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\code{format} so the answer will be of length that of the longer of the
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\code{format} so the answer will be of length that of the longer of the
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vectors.
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vectors.
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