This is important to inform the customer when they can visit but also for Google to pull up the location within open hours.
Meta Information Optimization
The meta information is a preview of the page or site that shows up in the SERPs. Getting this right and optimizing them properly can entice the possible customer to see where you are located and see the phone number without even entering the site. You can think of this as an advertisement to those surfing or browsing the web. Get this right, and the customer is very likely to click on the link taking you to the site or even calling and getting directions before even reviewing other possible options.