How to find an element by an atypical attribute?

Question

JavaScript

I want to grab a span element (to change it later) inside a div with "data-date" attribute equal to "2018-1-23".

<div data-year="2018" data-month="1" data-day="23" class="calendar-day" data-date="2018-1-23">
<span>23</span>
</div>

Answer 1

console.log(jQuery('div[data-date="2018-1-23"]'));