I think what @dnickel suggested is this is the way to go.
To expand on that, for your use case:
To get an "is any of" option for hour, it must be a string. So, use an expression to evaluate $hour24 as a string, and check if it is any of a list of string hours.
Note: The timer becomes every hour instead of every day, and then you can choose the minute of those hours for it to run.