<a href="https://en.wikipedia.org/wiki/Albert_Hofmann" id="mwvQ" rel="mw:WikiLink" title="Albert Hofmann">Albert Hofmann</a> deliberately doses himself with <a href="https://en.wikipedia.org/wiki/LSD" id="mwvg" rel="mw:WikiLink" title="LSD">LSD</a> for the first time, three days after having discovered its effects on <a href="https://en.wikipedia.org/wiki/April_16" id="mwvw" rel="mw:WikiLink" title="April 16">April 16</a>, an event commonly known and celebrated as <a class="mw-redirect" href='https://en.wikipedia.org/wiki/History_of_lysergic_acid_diethylamide#"Bicycle_Day"' id="mwwA" rel="mw:WikiLink" title="History of lysergic acid diethylamide">Bicycle Day</a>.