Fête des lumières
...that on every December 8th, families celebrating Fête des lumières in Lyon, France, line their windowsills with candles to express gratitude to Mary, mother of Jesus? 
...that on every <a href="./December_8" id="mwBm8" rel="mw:WikiLink" title="December 8">December 8<sup id="mwBnA">th</sup></a>, families celebrating <b id="mwBnE"><a class="mw-redirect" href="./Fête_des_lumières" id="mwBnI" rel="mw:WikiLink" title="Fête des lumières">Fête des lumières</a></b> in <a href="./Lyon" id="mwBnM" rel="mw:WikiLink" title="Lyon">Lyon</a>, <a href="./France" id="mwBnQ" rel="mw:WikiLink" title="France">France</a>, line their windowsills with candles to express gratitude to <a href="./Mary,_mother_of_Jesus" id="mwBnU" rel="mw:WikiLink" title="Mary, mother of Jesus">Mary, mother of Jesus</a>? (<i id="mwBnY">pictured</i>)