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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Is x a date-time object?</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for is.instant {lubridate}"><tr><td>is.instant {lubridate}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Is x a date-time object?</h2> <h3>Description</h3> <p>An instant is a specific moment in time. Most common date-time objects (e.g, POSIXct, POSIXlt, and Date objects) are instants. </p> <h3>Usage</h3> <pre> is.instant(x) is.timepoint(x) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>x</code></td> <td> <p>an R object</p> </td></tr> </table> <h3>Value</h3> <p>TRUE if x is a POSIXct, POSIXlt, or Date object, FALSE otherwise. </p> <h3>See Also</h3> <p><code><a href="is.timespan.html">is.timespan()</a></code>, <code><a href="posix_utils.html">is.POSIXt()</a></code>, <code><a href="date_utils.html">is.Date()</a></code> </p> <h3>Examples</h3> <pre> is.instant(as.Date("2009-08-03")) # TRUE is.timepoint(5) # FALSE </pre> <hr /><div style="text-align: center;">[Package <em>lubridate</em> version 1.7.9 <a href="00Index.html">Index</a>]</div> </body></html>