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<section id="numpy-busday-offset">
<h1>numpy.busday_offset<a class="headerlink" href="#numpy-busday-offset" title="Link to this heading">#</a></h1>
<dl class="py function">
<dt class="sig sig-object py" id="numpy.busday_offset">
<span class="sig-prename descclassname"><span class="pre">numpy.</span></span><span class="sig-name descname"><span class="pre">busday_offset</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">dates</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">offsets</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">roll</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'raise'</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">weekmask</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'1111100'</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">holidays</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">busdaycal</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">out</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#numpy.busday_offset" title="Link to this definition">#</a></dt>
<dd><p>First adjusts the date to fall on a valid day according to
the <code class="docutils literal notranslate"><span class="pre">roll</span></code> rule, then applies offsets to the given dates
counted in valid days.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters<span class="colon">:</span></dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>dates</strong><span class="classifier">array_like of datetime64[D]</span></dt><dd><p>The array of dates to process.</p>
</dd>
<dt><strong>offsets</strong><span class="classifier">array_like of int</span></dt><dd><p>The array of offsets, which is broadcast with <code class="docutils literal notranslate"><span class="pre">dates</span></code>.</p>
</dd>
<dt><strong>roll</strong><span class="classifier">{‘raise’, ‘nat’, ‘forward’, ‘following’, ‘backward’, ‘preceding’, ‘modifiedfollowing’, ‘modifiedpreceding’}, optional</span></dt><dd><p>How to treat dates that do not fall on a valid day. The default
is ‘raise’.</p>
<ul class="simple">
<li><p>‘raise’ means to raise an exception for an invalid day.</p></li>
<li><p>‘nat’ means to return a NaT (not-a-time) for an invalid day.</p></li>
<li><p>‘forward’ and ‘following’ mean to take the first valid day
later in time.</p></li>
<li><p>‘backward’ and ‘preceding’ mean to take the first valid day
earlier in time.</p></li>
<li><p>‘modifiedfollowing’ means to take the first valid day
later in time unless it is across a Month boundary, in which
case to take the first valid day earlier in time.</p></li>
<li><p>‘modifiedpreceding’ means to take the first valid day
earlier in time unless it is across a Month boundary, in which
case to take the first valid day later in time.</p></li>
</ul>
</dd>
<dt><strong>weekmask</strong><span class="classifier">str or array_like of bool, optional</span></dt><dd><p>A seven-element array indicating which of Monday through Sunday are
valid days. May be specified as a length-seven list or array, like
[1,1,1,1,1,0,0]; a length-seven string, like ‘1111100’; or a string
like “Mon Tue Wed Thu Fri”, made up of 3-character abbreviations for
weekdays, optionally separated by white space. Valid abbreviations
are: Mon Tue Wed Thu Fri Sat Sun</p>
</dd>
<dt><strong>holidays</strong><span class="classifier">array_like of datetime64[D], optional</span></dt><dd><p>An array of dates to consider as invalid dates. They may be
specified in any order, and NaT (not-a-time) dates are ignored.
This list is saved in a normalized form that is suited for
fast calculations of valid days.</p>
</dd>
<dt><strong>busdaycal</strong><span class="classifier">busdaycalendar, optional</span></dt><dd><p>A <a class="reference internal" href="numpy.busdaycalendar.html#numpy.busdaycalendar" title="numpy.busdaycalendar"><code class="xref py py-obj docutils literal notranslate"><span class="pre">busdaycalendar</span></code></a> object which specifies the valid days. If this
parameter is provided, neither weekmask nor holidays may be
provided.</p>
</dd>
<dt><strong>out</strong><span class="classifier">array of datetime64[D], optional</span></dt><dd><p>If provided, this array is filled with the result.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns<span class="colon">:</span></dt>
<dd class="field-even"><dl class="simple">
<dt><strong>out</strong><span class="classifier">array of datetime64[D]</span></dt><dd><p>An array with a shape from broadcasting <code class="docutils literal notranslate"><span class="pre">dates</span></code> and <code class="docutils literal notranslate"><span class="pre">offsets</span></code>
together, containing the dates with offsets applied.</p>
</dd>
</dl>
</dd>
</dl>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<dl class="simple">
<dt><a class="reference internal" href="numpy.busdaycalendar.html#numpy.busdaycalendar" title="numpy.busdaycalendar"><code class="xref py py-obj docutils literal notranslate"><span class="pre">busdaycalendar</span></code></a></dt><dd><p>An object that specifies a custom set of valid days.</p>
</dd>
<dt><a class="reference internal" href="numpy.is_busday.html#numpy.is_busday" title="numpy.is_busday"><code class="xref py py-obj docutils literal notranslate"><span class="pre">is_busday</span></code></a></dt><dd><p>Returns a boolean array indicating valid days.</p>
</dd>
<dt><a class="reference internal" href="numpy.busday_count.html#numpy.busday_count" title="numpy.busday_count"><code class="xref py py-obj docutils literal notranslate"><span class="pre">busday_count</span></code></a></dt><dd><p>Counts how many valid days are in a half-open date range.</p>
</dd>
</dl>
</div>
<p class="rubric">Examples</p>
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<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span><span class="w"> </span><span class="nn">numpy</span><span class="w"> </span><span class="k">as</span><span class="w"> </span><span class="nn">np</span>
<span class="gp">>>> </span><span class="c1"># First business day in October 2011 (not accounting for holidays)</span>
<span class="gp">... </span><span class="n">np</span><span class="o">.</span><span class="n">busday_offset</span><span class="p">(</span><span class="s1">'2011-10'</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">roll</span><span class="o">=</span><span class="s1">'forward'</span><span class="p">)</span>
<span class="go">np.datetime64('2011-10-03')</span>
<span class="gp">>>> </span><span class="c1"># Last business day in February 2012 (not accounting for holidays)</span>
<span class="gp">... </span><span class="n">np</span><span class="o">.</span><span class="n">busday_offset</span><span class="p">(</span><span class="s1">'2012-03'</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="n">roll</span><span class="o">=</span><span class="s1">'forward'</span><span class="p">)</span>
<span class="go">np.datetime64('2012-02-29')</span>
<span class="gp">>>> </span><span class="c1"># Third Wednesday in January 2011</span>
<span class="gp">... </span><span class="n">np</span><span class="o">.</span><span class="n">busday_offset</span><span class="p">(</span><span class="s1">'2011-01'</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="n">roll</span><span class="o">=</span><span class="s1">'forward'</span><span class="p">,</span> <span class="n">weekmask</span><span class="o">=</span><span class="s1">'Wed'</span><span class="p">)</span>
<span class="go">np.datetime64('2011-01-19')</span>
<span class="gp">>>> </span><span class="c1"># 2012 Mother's Day in Canada and the U.S.</span>
<span class="gp">... </span><span class="n">np</span><span class="o">.</span><span class="n">busday_offset</span><span class="p">(</span><span class="s1">'2012-05'</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">roll</span><span class="o">=</span><span class="s1">'forward'</span><span class="p">,</span> <span class="n">weekmask</span><span class="o">=</span><span class="s1">'Sun'</span><span class="p">)</span>
<span class="go">np.datetime64('2012-05-13')</span>
</pre></div>
</div>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="c1"># First business day on or after a date</span>
<span class="gp">... </span><span class="n">np</span><span class="o">.</span><span class="n">busday_offset</span><span class="p">(</span><span class="s1">'2011-03-20'</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">roll</span><span class="o">=</span><span class="s1">'forward'</span><span class="p">)</span>
<span class="go">np.datetime64('2011-03-21')</span>
<span class="gp">>>> </span><span class="n">np</span><span class="o">.</span><span class="n">busday_offset</span><span class="p">(</span><span class="s1">'2011-03-22'</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">roll</span><span class="o">=</span><span class="s1">'forward'</span><span class="p">)</span>
<span class="go">np.datetime64('2011-03-22')</span>
<span class="gp">>>> </span><span class="c1"># First business day after a date</span>
<span class="gp">... </span><span class="n">np</span><span class="o">.</span><span class="n">busday_offset</span><span class="p">(</span><span class="s1">'2011-03-20'</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">roll</span><span class="o">=</span><span class="s1">'backward'</span><span class="p">)</span>
<span class="go">np.datetime64('2011-03-21')</span>
<span class="gp">>>> </span><span class="n">np</span><span class="o">.</span><span class="n">busday_offset</span><span class="p">(</span><span class="s1">'2011-03-22'</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">roll</span><span class="o">=</span><span class="s1">'backward'</span><span class="p">)</span>
<span class="go">np.datetime64('2011-03-23')</span>
</pre></div>
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