I’ve forwarded your request on the google sharing to the dev team, as soon as they’ve had a look I’ll update you on their suggestion.
Looking at the source code for your opening hours it looks like this was created in a text widget, unfortunately WP strips out any additional formatting which is why you’re getting the result you are. I would say the best way to do what you’re looking to is to use a table generator and then copy/paste the html code directly into the widget. I just used this – http://www.tablesgenerator.com/html_tables# and it worked really well.
Result – http://screencast.com/t/9JqGv9nZluF