Map including “opening_hours” layer

This maps displays objects tagged with “opening_hours” as colored circles:

• Blue: now open,
• Blueyellow: always open (24/7),
• Grayblue: closed, but will open today,
• Gray: closed, and will stay closed today,
• White: unknown,
• Gray: no collection this in week,
• Red: syntax error or part of value not (yet) understood,
• Yellow: other problems (can't happen™)