app/javascript/react/assets/icons/calendar.svg
<svg width="20" height="20" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
<rect x="3" y="6" width="18" height="15" rx="2" stroke="white"/>
<path d="M3 11L21 11" stroke="white" stroke-linecap="round"/>
<path d="M9 16H15" stroke="white" stroke-linecap="round"/>
<path d="M8 3L8 7" stroke="white" stroke-linecap="round"/>
<path d="M16 3L16 7" stroke="white" stroke-linecap="round"/>
</svg>