<a href="https://en.wikipedia.org/wiki/Pennsylvania" id="mw1g" rel="mw:WikiLink" title="Pennsylvania">Pennsylvania</a> becomes the first (and only) state of the United States to celebrate <a href="https://en.wikipedia.org/wiki/Flag_Day_(United_States)" id="mw1w" rel="mw:WikiLink" title="Flag Day (United States)">Flag Day</a> officially as a <a class="mw-redirect" href="https://en.wikipedia.org/wiki/State_holiday" id="mw2A" rel="mw:WikiLink" title="State holiday">state holiday</a>.