You can create a rule based on the sunrise or sunset: The sun goes down and your lights come on automatically or the sun comes up and you are woken up with soft music from your Sonos and warm light in your bedroom.

To create a sunrise or sunset rule: In the " Smart Home" tab > "Rules" you can create sunrise or sunset rules.

1. Select the rule "At a specific time"
2.  Select the desired smart home devices
3.  Define actions for selected devices
4.  Select sunrise or sunset in the "Time" section
5.  Select days
6.  Optionally you can also specify a duration for the rule
7.  Select a name for the rule
8. Confirm the rule with "Done"

You have now created a new sunrise or sunset rule.