Both a <a href="https://en.wikipedia.org/wiki/Blue_moon" id="mwAXM" rel="mw:WikiLink" title="Blue moon">blue moon</a> and a <a href="https://en.wikipedia.org/wiki/January_2018_lunar_eclipse" id="mwAXQ" rel="mw:WikiLink" title="January 2018 lunar eclipse">total lunar eclipse</a> occur.