The opening hours for a business. Opening hours can be specified as a weekly time range, starting with days, then times per day. Multiple days can be listed with commas ',' separating each day. Day or time ranges are specified using a hyphen '-'.<br />- Days are specified using the following two-letter combinations: <code>Mo</code>, <code>Tu</code>, <code>We</code>, <code>Th</code>, <code>Fr</code>, <code>Sa</code>, <code>Su</code>.<br />- Times are specified using 24:00 time. For example, 3pm is specified as <code>15:00</code>. <br />- Here is an example: <code><time itemprop="openingHours" datetime="Tu,Th 16:00-20:00">Tuesdays and Thursdays 4-8pm</time></code>. <br />- If a business is open 7 days a week, then it can be specified as <code><time itemprop="openingHours" datetime="Mo-Su">Monday through Sunday, all day</time></code>.