what time is the big bus company tour start?end?

The Day Tour is valid for 24 or 48 and you can tour the city throughout this time. It has Hong Kong Island Route, the Kowloon Route and the Green Route to Stanley Market and Aberdeen. Each route includes several break points where you can hop-on, hop-off. while the night tours departs every night from Central, at 18:15, before crossing the harbour to the Kowloon pick up at 19:00hrs.