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    <p>efotinis found a good way using <strong>from_stream</strong> . </p> <hr> <p>I've looked into the manual of <code>date_time</code> and found it supports facets:</p> <pre><code>#include &lt;boost/date_time/gregorian/gregorian.hpp&gt; #include &lt;iostream&gt; #include &lt;sstream&gt; #include &lt;locale&gt; int main() { using namespace boost::gregorian; std::wstringstream ss; wdate_input_facet * fac = new wdate_input_facet(L"%Y-%m-%d"); ss.imbue(std::locale(std::locale::classic(), fac)); date d; ss &lt;&lt; L"2004-01-01 2005-01-01 2006-06-06"; while(ss &gt;&gt; d) { std::cout &lt;&lt; d &lt;&lt; std::endl; } } </code></pre> <p>You could also go with that. </p> <hr> <p>I've looked up how date facets work:</p> <ul> <li>The <code>boost::date_time::date_input_facet</code> template implements a facet. </li> <li>Facets are derived from <code>std::locale::facet</code> and every one has an unique id.</li> <li>You can <em>imbue</em> a new locale into a stream, replacing its old locale. The locale of a stream will be used for all sorts of parsing and conversions.</li> <li>When you create a new <code>std::locale</code> using the form i showed, you give it an existing locale, and a pointer to facet. The given facet will replace any existing facet of the same type in the locale given. (so, it would replace any other date_input_facet used).</li> <li>All facets are associated with the locale somehow, so that you can use <code>std::has_facet&lt;Facet&gt;(some_locale)</code> to check whether the given locale has some given facet type.</li> <li>You can use a facet from one locale by doing <code>std::use_facet&lt;Facet&gt;(some_locale).some_member...</code> .</li> <li>date_input_facet has a function get, which can be used like this:</li> </ul> <p>The below is essentially done by <code>operator&gt;&gt;</code> by boost::date_type :</p> <pre><code>// assume src is a stream having the wdate_input_facet in its locale. // wdate_input_facet is a boost::date_time::date_input_facet&lt;date,wchar_t&gt; typedef. date d; // iterate over characters of src std::istreambuf_iterator&lt;wchar_t&gt; b(src), e; // use the facet to parse the date std::use_facet&lt;wdate_input_facet&gt;(src.getloc()).get(b, e, src, d); </code></pre>
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    1. POConvert wide character strings to boost dates
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    1. USJohannes Schaub - litb
    1. USJohannes Schaub - litb
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    1. COThanks. "If you are sure ... " Yes. Your code is certainly clearer and terser! Is it more efficient?
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    2. COIt gets rid of the compiler warning! ( You fooled it :-)
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    3. COIt seems odd to me that the compiler rejects string( wstring(L"test") ) but accepts without complaint wstring ws(L"test"); string(ws.begin(), ws.end()) ). The effect is the same.
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