Offset for sunrise/sunset in IF_Condition is not currently supported, but I’ve noted your request. However, you can still achieve it with a Variable or Virtual Switch along with an additional rule. See the screenshot below for the rule example. The idea here is to reset the variable at midnight, and set the variable value to true when it’s 30 minutes before sunset. (This rule will be triggered at both midnight and 30 minutes before sunset.) Then you can use this variable in other rules’ condition to determine if the current time is at least 30 minutes before sunset. Feel free to let me know if you have any questions.